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Winter Storm Warning


URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
345 AM MST Tue Feb 21 2017


IDZ019-212200-
/O.CON.KPIH.WS.W.0009.000000T0000Z-170221T2200Z/
Upper Snake Highlands-
Including the cities of St. Anthony, Ashton, Island Park, Driggs,
and Victor
345 AM MST Tue Feb 21 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MST THIS
AFTERNOON...

* IMPACTS...Moderate to heavy snow and blowing snow is expected
  to create difficult driving conditions above 6000 ft,
  including passes. Road closures are possible.

* TIMING...Today through Tuesday with strongest winds on Tuesday.

* SNOW ACCUMULATIONS...Additional 2 to 4 inches above 6000 feet.
  Valley locations should stay warm enough to see all rain or
  light slushy accumulations.

* CONFIDENCE...Medium confidence in snow levels. Medium
  confidence in snowfall amounts in high elevations. Low
  confidence in valley snowfall amounts.

* LOCATIONS...Island Park, Ashton, Driggs, Victor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm warning for heavy snow means severe winter weather
conditions are expected or occurring. Significant amounts of snow
are forecast that will make travel dangerous. Only travel in an
emergency. If you must travel, keep an extra flashlight, food and
water in your vehicle in case of an emergency.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
330 AM MST Tue Feb 21 2017

MTZ008-015-055-212200-
/O.EXT.KTFX.WS.W.0003.000000T0000Z-170221T2200Z/
Beaverhead-Madison-Gallatin-
330 AM MST Tue Feb 21 2017

...WINTER STORM WARNING NOW IN EFFECT UNTIL 3 PM MST THIS
AFTERNOON...

* Locations...Monida Pass, Targhee Pass, West Yellowstone, and
  Raynolds Pass.

* Timing...Periods of snow, heavy at times, are expected to
  continue through mid-afternoon. Snow should then taper to light
  snow showers by this evening.

* Snow Accumulations...An additional 2 to 6 inches, with greatest
amounts expected along the passes.

* Winds...Southwest 20 to 30 mph with gusts up to 55 mph.

* Snow Level...Near 6000 feet.

* Impacts...Visibility will likely be reduced to 1/2 mile or less
  at times in falling snow, especially when accompanied by blowing
  snow. Roadways will likely be snow-covered and slick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for heavy snow means severe winter weather
conditions are expected or occurring.  Significant amounts of
snow are forecast that will make travel dangerous. Only travel in
an emergency. If you must travel...keep an extra flashlight...
food...and water in your vehicle in case of an emergency.

For specific road and travel conditions in Montana...dial 5 1 1 .

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
228 AM MST Tue Feb 21 2017

...Heavy snow will continue to fall over the western mountains
through tonight...

.Southwest flow aloft with a deep moisture plume will continue to
produce periods of moderate to heavy snow with strong winds at
ridge top and pass level. Prolonged periods of 2 inch an hour
snowfall is expected. Valleys will stay warm enough for mainly
rain or a rain/snow mix until this evening, when temperatures
cool as a cold front quickly moves through the area. Precipitation
will then change over to snow through the overnight hours
tonight. Some light snow will continue with low accumulations
Wednesday and Wednesday night with much colder temperatures.

WYZ002-212300-
/O.CON.KRIW.WS.W.0008.000000T0000Z-170222T1200Z/
Absaroka Mountains-
228 AM MST Tue Feb 21 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST
WEDNESDAY...

* Timing...Snow and strong winds will continue through tonight.


* Snowfall accumulation...Snowfall of 10 to 20 inches.

* Wind and Visibility...West to southwest winds of 25 to 35 mph
  with gusts to 60 mph, especially on mountain passes and upper
  ridges. Visibility will be near zero at times in heavy snow
  and blowing snow.

* Main Impact...Travel may become very difficult with the wind
  and snow producing slick, snow-packed roads and high drifts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm warning means significant amounts of snow, and or
blowing snow are expected or occurring. This could make travel
very hazardous or impossible. If you must travel keep some food,
water, and an extra flashlight in your vehicle in case of an
emergency. Check the latest road conditions at wyoroad.info or by
dialing 5 1 1.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
228 AM MST Tue Feb 21 2017

...Heavy snow will continue to fall over the western mountains
through tonight...

.Southwest flow aloft with a deep moisture plume will continue to
produce periods of moderate to heavy snow with strong winds at
ridge top and pass level. Prolonged periods of 2 inch an hour
snowfall is expected. Valleys will stay warm enough for mainly
rain or a rain/snow mix until this evening, when temperatures
cool as a cold front quickly moves through the area. Precipitation
will then change over to snow through the overnight hours
tonight. Some light snow will continue with low accumulations
Wednesday and Wednesday night with much colder temperatures.

WYZ012-024-212300-
/O.CON.KRIW.WS.W.0008.000000T0000Z-170222T1200Z/
Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges-
228 AM MST Tue Feb 21 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST
WEDNESDAY...

* Timing...Snow and areas of strong wind will occur through
  tonight.

* Snowfall Accumulation...15 to 25 inches are expected, with
  amounts up to 30 inches in the Teton mountains.

* Wind and Visibility...West to southwest winds of 25 to 35 mph
  with gusts to 60 mph...especially in open areas or mountain
  summits. Visibility frequently below a quarter mile in heavy
  snow and blowing snow.

* Main Impact...Travel will become very difficult with the wind
  and snow producing slick, snow-packed roads along with high
  drifts over mountain passes. Please monitor JHAVALANCHE.ORG if
  your plans include travel into the backcountry. Also, the
  severely reduced visibility will be very disorientating for
  those recreating in the backcountry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm warning means significant amounts of snow, and or
blowing snow are expected or occurring. This could make travel
very hazardous or impossible. If you must travel keep some food,
water, and an extra flashlight in your vehicle in case of an
emergency. Check the latest road conditions at wyoroad.info or by
dialing 5 1 1.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
228 AM MST Tue Feb 21 2017

...Heavy snow will continue to fall over the western mountains
through tonight...

.Southwest flow aloft with a deep moisture plume will continue to
produce periods of moderate to heavy snow with strong winds at
ridge top and pass level. Prolonged periods of 2 inch an hour
snowfall is expected. Valleys will stay warm enough for mainly
rain or a rain/snow mix until this evening, when temperatures
cool as a cold front quickly moves through the area. Precipitation
will then change over to snow through the overnight hours
tonight. Some light snow will continue with low accumulations
Wednesday and Wednesday night with much colder temperatures.

WYZ014-015-212300-
/O.CON.KRIW.WS.W.0008.000000T0000Z-170222T1200Z/
Wind River Mountains West-Wind River Mountains East-
228 AM MST Tue Feb 21 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST
WEDNESDAY...

* Timing...Snow and strong winds will continue through tonight.

* Snowfall Accumulation...8 to 16 inches over South Pass. 12 to
  24 inches over the rest of the Wind River Mountains with the
  highest amounts over the western slopes.

* Wind and Visibility...West to southwest winds of 25 to 35 mph
  with gusts to 45 mph, gusts to 65 mph on South Pass.
  Visibility frequently below a quarter mile in heavy snow and
  blowing snow.

* Main Impact...Travel may become very difficult or impossible
  across South Pass due to the wind and snow producing slick,
  snow-packed roads along with high drifts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm warning means significant amounts of snow, and or
blowing snow are expected or occurring. This could make travel
very hazardous or impossible. If you must travel keep some food,
water, and an extra flashlight in your vehicle in case of an
emergency. Check the latest road conditions at wyoroad.info or by
dialing 5 1 1.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
228 AM MST Tue Feb 21 2017

...Heavy snow will continue to fall over the western mountains
through tonight...

.Southwest flow aloft with a deep moisture plume will continue to
produce periods of moderate to heavy snow with strong winds at
ridge top and pass level. Prolonged periods of 2 inch an hour
snowfall is expected. Valleys will stay warm enough for mainly
rain or a rain/snow mix until this evening, when temperatures
cool as a cold front quickly moves through the area. Precipitation
will then change over to snow through the overnight hours
tonight. Some light snow will continue with low accumulations
Wednesday and Wednesday night with much colder temperatures.

WYZ001-212300-
/O.CON.KRIW.WS.W.0008.000000T0000Z-170222T1200Z/
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
228 AM MST Tue Feb 21 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST
WEDNESDAY...

* Timing...Snow and windy areas will continue over Yellowstone
  National Park and continue through tonight.

* Snowfall accumulation...3 to 6 inches in the Mammoth and Tower
  Junction areas. Otherwise 15 to 25 inches of snow are
  expected, with localized amounts up to 30 inches over
  southwest portions of the park.

* Wind and Visibility...West to southwest winds of 20 to 30 mph
  with gusts to 45 mph. Visibility frequently below a quarter
  mile in heavy snow and blowing snow.

* Main Impact...The severely reduced visibility in snow and
  blowing snow can be very disorientating at time for those
  recreating across Yellowstone.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm warning means significant amounts of snow, and or
blowing snow are expected or occurring. This could make travel
very hazardous or impossible. If you must travel keep some food,
water, and an extra flashlight in your vehicle in case of an
emergency.

&&

$$


High Wind Warning


URGENT - WEATHER MESSAGE
National Weather Service Rapid City SD
401 AM MST Tue Feb 21 2017

WYZ054-055-058-220000-
/O.CON.KUNR.HW.W.0002.000000T0000Z-170222T0000Z/
Northern Campbell-Southern Campbell-Weston-
Including the cities of Gillette, Wright, Newcastle, and Upton
401 AM MST Tue Feb 21 2017

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* Timing...strong winds will continue through much of today. The
strongest winds will be south of Gillette and west of Newcastle.

* Winds...Southwest 30 to 40 mph with gusts up to 60 mph.

* Impacts...The high winds can blow down large trees and damage
  roofs, small outbuildings, and signs. Sudden wind gusts can
  cause drivers to lose control, especially in lightweight or
  high profile vehicles. Strong winds can cause blowing dust,
  reduced visibility, and flying debris. Trees may blow down on
  roads and trails.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A high wind warning means 40 mph winds...or gusts over 60 mph...
are expected or occurring.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Great Falls MT
315 AM MST Tue Feb 21 2017

MTZ008-015-052>055-220000-
/O.NEW.KTFX.HW.W.0004.170221T1200Z-170222T0300Z/
Beaverhead-Madison-Jefferson-Broadwater-Meagher-Gallatin-
315 AM MST Tue Feb 21 2017

...HIGH WIND WARNING IN EFFECT FROM 5 AM THIS MORNING UNTIL 8 PM
MST THIS EVENING...

The National Weather Service in Great Falls has issued a High
Wind Warning...which is in effect until 8 PM MST this evening.

* Winds...Southwest 25 to 35 mph with gusts up to 65 mph.

* Timing...Winds will strengthen after daybreak and are expected
  to be strongest late this morning through afternoon. Winds
  should begin to ease this evening.

* Impacts...Difficult travel, especially for high-profile
  vehicles. Isolated tree and power line damage may occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
251 AM MST Tue Feb 21 2017

WYZ116-117-220100-
/O.CON.KCYS.HW.W.0011.000000T0000Z-170222T0100Z/
South Laramie Range-South Laramie Range Foothills-
Including the cities of Buford, Pumpkin Vine, Vedauwoo, Whitaker,
Federal, and Horse Creek
251 AM MST Tue Feb 21 2017

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS
EVENING...

* TIMING...Until 6 pm Tuesday.

* WINDS...West to southwest 35 to 50 MPH sustained with gusts
  around 70 MPH.

* IMPACTS...Mainly to transportation. Light weight and high
  profile vehicles traveling on Interstate 80 between Cheyenne
  and Laramie have a heightened risk of blowover.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
251 AM MST Tue Feb 21 2017

WYZ106-110-220100-
/O.CON.KCYS.HW.W.0011.000000T0000Z-170222T0100Z/
Central Laramie Range and Southwest Platte County-
North Snowy Range Foothills-
Including the cities of Bordeaux, Arlington, and Elk Mountain
251 AM MST Tue Feb 21 2017

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS
EVENING...

* TIMING...Winds will quickly increase early this morning and
  remain strong through this afternoon.

* WINDS...West between 35 to 50 MPH sustained with gusts around 70
  MPH. The strongest winds will occur this morning.

* IMPACTS...Mainly to transportation. Light weight and high
  profile vehicles traveling on Interstate 25 between Cheyenne
  and Wheatland have a heightened risk of blowover.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Cheyenne WY
251 AM MST Tue Feb 21 2017

WYZ101-102-105-107-108-115-118-119-220100-
/O.EXT.KCYS.HW.W.0011.170221T0951Z-170222T0100Z/
Converse County Lower Elevations-Niobrara County-Shirley Basin-
East Platte County-Goshen County-Laramie Valley-
Central Laramie County-East Laramie County-
Including the cities of Bill, Douglas, Deer Creek, Glenrock,
Lusk, Redbird, Medicine Bow, Shirley Basin, Wheatland, Guernsey,
Torrington, Bosler, Laramie, Cheyenne, and Pine Bluffs
251 AM MST Tue Feb 21 2017

...HIGH WIND WARNING NOW IN EFFECT UNTIL 6 PM MST THIS EVENING...

* TIMING...Until 6 pm this evening.

* WINDS...West at 35 to 50 MPH sustained with gusts to 70 MPH.

* IMPACTS...Mainly to transportation. Light weight and high
  profile vehicles traveling on Interstate 25...Interstate 80...
  and state roads east of Interstate 25 towards the Nebraska
  border have a heightened risk of blowover.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Billings MT
250 AM MST Tue Feb 21 2017

MTZ036-038-058-WYZ099-220400-
/O.NEW.KBYZ.HW.W.0003.170221T1300Z-170222T0400Z/
Powder River-Southern Big Horn-Southern Rosebud-
Sheridan Foothills-
Including the cities of Broadus, Pryor, Lodge Grass, Lame Deer,
and Sheridan
250 AM MST Tue Feb 21 2017

...HIGH WIND WARNING IN EFFECT FROM 6 AM THIS MORNING TO 9 PM MST
THIS EVENING...

The National Weather Service in Billings has issued a High Wind
Warning...which is in effect from 6 AM this morning to 9 PM MST
this evening.

* TIMING...Southwest to west winds will increase this morning and
  remain strong through sunset. Strongest winds will be along the
  eastern slopes of the Pryor and Bighorn Mountains, and over the
  higher hills further east.

* IMPACTS...Hazardous cross winds on I-90 from Lodge Grass to
  Sheridan, as well as Highway 212 through Lame Deer and Broadus.

* WINDS...Gusts of 50 to 60 mph.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds of these magnitudes can cause property damage without extra
precautions. Motorists in high profile vehicles should use
caution.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
225 AM MST Tue Feb 21 2017

...High winds expected across parts of Fremont, Natrona, Hot
Springs, and Johnson Counties through this evening...

.A tight surface pressure and strong winds aloft mixing down will
result in strong to potentially damaging wind at times through
this evening across portions of central and northern Wyoming.

WYZ009>011-220000-
/O.EXB.KRIW.HW.W.0007.170221T1200Z-170222T0600Z/
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-
Including the cities of Buffalo and Kaycee
225 AM MST Tue Feb 21 2017

...HIGH WIND WARNING IN EFFECT FROM 5 AM EARLY THIS MORNING TO
11 PM MST THIS EVENING...

The National Weather Service in Riverton has issued a High Wind
Warning, which is in effect from 5 AM early this morning to 11 PM
MST this evening.

* TIMING...High winds are expected to develop this morning, and
  continue through the evening hours.

* WINDS...West to southwest 20 to 40 mph with some gusts to 65
  mph. Gusts to 75 mph could occur on the eastern slopes of the
  Bighorn Mountains.

* IMPACTS...Strong cross winds will produce an extreme blow over
  hazard for light weight and high profile vehicles. This includes
  Interstates 25 and 90.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
225 AM MST Tue Feb 21 2017

...High winds expected across parts of Fremont, Natrona, Hot
Springs, and Johnson Counties through this evening...

.A tight surface pressure and strong winds aloft mixing down will
result in strong to potentially damaging wind at times through
this evening across portions of central and northern Wyoming.

WYZ019-020-220000-
/O.CON.KRIW.HW.W.0007.000000T0000Z-170222T0600Z/
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-
Including the cities of Jeffrey City and Casper
225 AM MST Tue Feb 21 2017

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* TIMING...Strong to potentially damage wind through this evening.

* WINDS...Southwest 35 to 45 mph gusting to 65 mph. Locally higher
  wind gusts to 75 mph on Outer Drive on the south side of Casper,
  and in the Green mountains and Rattlesnake Range. A wind gust of
  66 mph was measured on Outer Drive at 130 AM.

* IMPACTS...Mainly to transportation. Extreme blow over risk for
  light and high profile vehicles, including along Interstate 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
225 AM MST Tue Feb 21 2017

...High winds expected across parts of Fremont, Natrona, Hot
Springs, and Johnson Counties through this evening...

.A tight surface pressure and strong winds aloft mixing down will
result in strong to potentially damaging wind at times through
this evening across portions of central and northern Wyoming.

WYZ005-018-220000-
/O.CON.KRIW.HW.W.0007.000000T0000Z-170222T0600Z/
Southwest Big Horn Basin-Lander Foothills-
Including the cities of Thermopolis and Lander
225 AM MST Tue Feb 21 2017

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* TIMING...High winds are expected to mix down at times through
  this evening. The strong wind speeds and gusts will come
  suddenly, with possible lulls in the strong wind.

* WINDS...West to southwest 30 to 40 mph with gusts to 65 mph.

* IMPACTS...Mainly to transportation. Extreme blow over risk for
  light and high profile vehicles, including along Interstate 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

Team Riverton/21


Flood Warning


Flood Statement
National Weather Service Riverton WY
523 AM MST TUE FEB 21 2017

WYC003-221500-
/O.CON.KRIW.FA.W.0006.000000T0000Z-170222T1500Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Big Horn-
523 AM MST TUE FEB 21 2017

...A FLOOD WARNING FOR AN ICE JAM REMAINS IN EFFECT UNTIL 800 AM MST
WEDNESDAY FOR SOUTH CENTRAL BIG HORN COUNTY...

At 5 AM MST, the river gauge on the Big Horn River at Basin was at
10.7 feet. Flood stage is 10.5 feet. The Big Horn River at Basin
crested at 11.2 feet around 10 pm Monday night. A steady, slow fall
is expected at Basin, but the Ice Jam flooding could worsen
downstream on the Big Horn River including the Greybull area. The
river at Greybull is expected to crest right around flood stage of
92 feet on Wednesday.

Other small streams and creeks across Big Horn County feeding into
the Big Horn River, such as Nowood Creek, could also be running high
or flooding in some areas.

Some locations that will experience flooding include Greybull,
Basin and Manderson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

River ice is very unpredictable, and may move and jam with little
notice. Any ice jam can cause flooding, as the ice dams the river,
causing rapid increases in river levels in a short period of time.
People living near the Big Horn River should monitor the situation
closely and be ready to move to higher ground if flooding occurs.

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 4478 10813 4473 10813 4462 10807 4453 10802
      4432 10796 4427 10788 4417 10788 4417 10798
      4431 10807 4450 10811 4459 10816 4478 10824

$$

21

Flood Warning
National Weather Service Pocatello ID
1143 AM MST MON FEB 20 2017

IDC041-071-211900-
/O.EXT.KPIH.FA.W.0017.000000T0000Z-170221T1900Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Oneida ID-Franklin ID-
1143 AM MST MON FEB 20 2017

The National Weather Service in Pocatello has extended the

* Flood Warning for...
  Rain and Snowmelt in...
  Oneida County in southeastern Idaho...
  Franklin County in southeastern Idaho...

* Until noon MST Tuesday

* Looking at current webcam imagery...ponding of water is evident.
  With .50 to .75 inches of rain forecasted...low-level flooding is
  likely to increase.

* Some locations that will experience flooding include...
  Preston, Malad, Franklin, Juniper, Oneida Narrows Reservoir,
  Pleasantview, Cherry Creek Rest Area, Holbrook Summit, Thatcher,
  Dayton, Weston, Clifton, Oxford, Mapleton, Stone, Mink Creek,
  Samaria, Whitney, Riverdale and Holbrook.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.

&&

LAT...LON 4232 11300 4232 11264 4234 11233 4232 11233
      4232 11228 4235 11226 4235 11219 4220 11211
      4219 11206 4228 11205 4228 11200 4225 11198
      4226 11190 4242 11189 4242 11175 4243 11173
      4241 11171 4242 11163 4200 11162 4200 11300

$$

tw

Flood Warning
National Weather Service Riverton WY
811 AM MST MON FEB 20 2017

WYC003-221500-
/O.NEW.KRIW.FA.W.0005.170220T1511Z-170222T1500Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Big Horn-
811 AM MST MON FEB 20 2017

The National Weather Service in Riverton has issued a

* Flood Warning for...
  An Ice Jam in...
  South central Big Horn County in central Wyoming...

* Until 800 AM MST Wednesday

* At 759 AM MST, the river gauge on the Big Horn River at Basin
  was at 10.8 feet, flood stage is 10.5 feet.  Ice jamming may
  cause the stage to rise to 11.5 feet at times today and Tuesday.
  The river stage on the Big Horn river at Greybull may rise to 93.5
  feet through Tuesday.  The flood stage on the Big Horn river at
  Greybull is 92.0 feet.

* Some locations that will experience flooding include...
  Greybull, Basin and Manderson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 4478 10813 4473 10813 4462 10807 4453 10802
      4432 10796 4427 10788 4417 10788 4417 10798
      4431 10807 4450 10811 4459 10816 4478 10824

$$

Baker


Red Flag Warning


URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
1028 PM MST Mon Feb 20 2017

COZ215-216-211330-
/O.CON.KBOU.FW.W.0004.170221T1800Z-170222T0100Z/
Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
1028 PM MST Mon Feb 20 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 6 PM MST
TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE
FOOTHILLS BELOW 7500 FEET...

* Affected Area...Fire Weather Zones 215 and 216.

* Timing...Fire Danger will increase by noon on Tuesday and
  continue into early Tuesday Evening.

* Winds...Southwest 15 to 25 mph with gusts up to 55 mph.

* Relative Humidity...as low as 14 percent.

* Impacts...If a fire starts, it will be capable of spreading
  rapidly through grasses and brush due to the strong winds.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and very warm temperatures
will contribute to extreme fire behavior.

&&

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
1028 PM MST Mon Feb 20 2017

COZ238>251-211330-
/O.CON.KBOU.FW.W.0004.170221T1800Z-170222T0100Z/
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1028 PM MST Mon Feb 20 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 6 PM MST
TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE
I-25 CORRIDOR...NORTHEAST AND EAST CENTRAL PLAINS...

* Affected Area...Fire Weather Zones 238...239...240...241...
  242...243...244...245...246...247...248...249...250 and 251.

* Timing...Fire Danger will increase by noon on Tuesday and
  continue into early Tuesday Evening.

* Winds...West 15 to 25 mph with gusts up to 45 mph.

* Relative Humidity...as low as 11 percent.

* Impacts...If a fire starts, it will be capable of spreading
  rapidly through grasses and brush due to the strong winds.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and unseasonably warm
temperatures will contribute to extreme fire behavior.

&&

$$


Winter Weather Advisory


URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
357 AM MST Tue Feb 21 2017

UTZ007>009-212200-
/O.CON.KSLC.WW.Y.0015.170221T2100Z-170222T1800Z/
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-
Including the cities of Woodruff, Randolph, Alta, Brighton,
and Mirror Lake Highway
357 AM MST Tue Feb 21 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 11 AM MST WEDNESDAY...

* AFFECTED AREA...The Wasatch and Western Uinta Mountains.

* SNOW ACCUMULATIONS...7 to 15 inches.

* TIMING...Snow will develop late this afternoon and become heavy
  at times tonight. This snow will taper off Wednesday morning,
  but could pick up again Wednesday afternoon and continue into
  Thursday morning with additional accumulation likely.

* SNOW LEVELS...At or above 8000 feet this afternoon falling below
  6000 feet tonight.

* WINDS...Strong southwest winds gusting in excess of 50 mph along
  ridges will continue through the day today before becoming
  westerly and diminishing tonight.

* IMPACTS...Winter driving conditions are expected on mountain
  routes beginning across the far north late this afternoon and
  spreading south tonight. This includes Parleys Canyon and Logan
  Summit. These conditions will continue into Wednesday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means that snow accumulations
will cause primarily travel difficulties. Be prepared for snow
covered roads. Use caution while driving.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx


Flood Advisory


Flood Advisory
National Weather Service Pocatello ID
1249 PM MST MON FEB 20 2017

IDC029-212000-
/O.EXT.KPIH.FA.Y.0014.000000T0000Z-170221T2000Z/
/00000.N.SM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caribou ID-
1249 PM MST MON FEB 20 2017

The National Weather Service in Pocatello has extended the

* Flood Advisory for...
  Snowmelt in...
  Southwestern Caribou County in southeastern Idaho...

* Until 100 PM MST Tuesday

* Rain on snow will create some localized areas of additional low-
  lying nuisance flooding this afternoon through the evening.
  Flooding could become more widespread and will be closely
  monitored.

* Some locations that will experience flooding include...
  Soda Springs, Grace, Chesterfield, Bancroft and Niter.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flood Advisory means river or stream flows are elevated, or ponding
of water in urban or other areas is occurring or is imminent.

&&

LAT...LON 4268 11157 4259 11146 4260 11158 4264 11163
      4263 11170 4244 11163 4243 11180 4261 11181
      4261 11190 4265 11194 4266 11186 4288 11197
      4288 11188 4266 11177

$$

TW

Flood Advisory
National Weather Service Pocatello ID
1226 PM MST MON FEB 20 2017

IDC013-019-023-037-051-065-211915-
/O.NEW.KPIH.FA.Y.0015.170220T1926Z-170221T1915Z/
/00000.N.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer ID-Blaine ID-Jefferson ID-Butte ID-Bonneville ID-Madison ID-
1226 PM MST MON FEB 20 2017

The National Weather Service in Pocatello has issued a

* Flood Advisory for...
  Rain and Snowmelt in...
  Eastern Custer County in central Idaho...
  Central Blaine County in central Idaho...
  Jefferson County in southeastern Idaho...
  Southern Butte County in southeastern Idaho...
  Northwestern Bonneville County in southeastern Idaho...
  Western Madison County in southeastern Idaho...

* Until 1215 PM MST Tuesday

* Rain on snow will create some localized areas of additional low-
  lying nuisance flooding this afternoon through the evening.
  Flooding could become more widespread and will be closely
  monitored.

* Some locations that will experience flooding include...
  Idaho Falls, Rexburg, Rigby, Arco, Carey, Ririe Reservoir,
  Terreton, Lorenzo, Picabo, Ammon, Iona, Sugar City, Ucon, Menan,
  Ririe, Roberts, Lewisville, Mud Lake, Hamer and Archer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flood Advisory means river or stream flows are elevated, or ponding
of water in urban or other areas is occurring or is imminent.

&&

LAT...LON 4339 11168 4345 11233 4365 11251 4365 11268
      4349 11288 4353 11332 4321 11372 4320 11438
      4333 11442 4335 11395 4353 11349 4379 11347
      4395 11361 4382 11334 4364 11326 4366 11311
      4400 11263 4403 11219 4396 11218 4385 11157

$$

TW


Wind Advisory


URGENT - WEATHER MESSAGE
National Weather Service Rapid City SD
401 AM MST Tue Feb 21 2017

SDZ025-026-072-074-220000-
/O.CON.KUNR.WI.Y.0004.000000T0000Z-170222T0000Z/
Northern Foot Hills-Rapid City-Sturgis/Piedmont Foot Hills-
Hermosa Foot Hills-
Including the cities of Spearfish, Rapid City, Sturgis,
and Hermosa
401 AM MST Tue Feb 21 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* Timing...Gusty westerly winds will continue at times through
  this afternoon.

* Winds...West 20 to 35 mph with gusts up to 50 mph.

* Impacts...Sudden wind gusts can cause drivers to lose control,
  especially in lightweight or high profile vehicles. Strong
  winds can cause blowing dust, reduced visibility, and flying
  debris.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A wind advisory means 30 mph winds...or gusts over 45 mph...are
expected or occurring.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Billings MT
250 AM MST Tue Feb 21 2017

MTZ065-066-220700-
/O.CON.KBYZ.WI.Y.0005.000000T0000Z-170222T0700Z/
Livingston Area-Beartooth Foothills-
Including the cities of Livingston, Fishtail, and McLeod
250 AM MST Tue Feb 21 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MST TONIGHT...

* TIMING...Southwest winds will increase this morning and remain
  strong until this evening.

* IMPACTS...Hazardous cross winds on Interstate 90 at Livingston,
  and on some rural roads near Nye.

* WINDS...Gusts to 60 mph.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution.

&&

$$

http://weather.gov/Billings


Local Area Emergency


MTC057-220015-

URGENT - IMMEDIATE BROADCAST REQUESTED
LOCAL AREA EMERGENCY
MONTANA EMERGENCY MANAGEMENT AGENCY GREAT FALLS MONTANA
RELAYED BY NATIONAL WEATHER SERVICE GREAT FALLS MT
433 PM MST MON FEB 20 2017

THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE
MONTANA EMERGENCY MANAGEMENT AGENCY MADISON COUNTY MONTANA.

...BOIL WATER ORDER ALERT CONTINUES FOR THE TOWN OF SHERIDAN
MONTANA...

THE TOWN OF SHERIDAN EXPERIENCED A WATER MAIN BREAK EARLY SUNDAY
MORNING, FEBRUARY 19, 2017, ON THE WEST SIDE OF TOWN. REPAIRS
HAVE BEEN MADE, AND THE TOWN`S WATER SYSTEM HAS BEEN RESTORED.
RESIDENTS ARE REMINDED TO BOIL THEIR DRINKING WATER FOR ONE MINUTE
AT A ROLLING BOIL AND COOLING BEFORE DRINKING, OR USE BOTTLED
WATER, UNTIL THE WATER QUALITY IS RESTORED.

DRINKING AND POTABLE WATER WILL BE AVAILABLE AT THE TOWN HALL FOR
RESIDENTS OF SHERIDAN TODAY UNTIL 5:00 PM.

TOWN OFFICIALS WILL BE TAKING SAMPLES OF THE WATER AND WILL
CONTINUE TO UPDATE RESIDENTS.

INFORMATION WILL BE POSTED ON MADISON COUNTY`S HOMEPAGE AT
WWW.MADISONCOUNTYMT.GOV AND BY CONTACTING THE SHERIDAN TOWN HALL
AT 406-842-5431.


$$


Winter Storm Watch


URGENT - WINTER WEATHER MESSAGE
National Weather Service Grand Junction CO
425 AM MST Tue Feb 21 2017

COZ003-004-013-212300-
/O.NEW.KGJT.WS.A.0009.170223T0100Z-170224T1600Z/
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-Flat Tops-
425 AM MST Tue Feb 21 2017

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH
FRIDAY MORNING...

The National Weather Service in Grand Junction has issued a
Winter Storm Watch...which is in effect from Wednesday evening
through Friday morning.

* LOCATIONS INCLUDE THE CITIES OF...Rio Blanco...Columbine...
  Hahns Peak...Toponas...Buford...Trappers Lake.

* TIMING...Scattered snow showers develop by Wednesday afternoon
  and become more widespread Wednesday night and Thursday as
  colder air sweeps in. Snow will be heavy at times on Thursday.

* SNOW ACCUMULATION...8 to 16 inches possible with locally higher
  amounts on west and northwest facing slopes.

* WINDS...West to northwest 10 to 20 mph with gusts up to 40 mph.

* IMPACTS...Travel and outdoor recreation may be impacted.
  Mountain roads and highways should be icy and snow packed with
  areas of blowing and drifting snow reducing visibility to under
  one mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Grand Junction CO
425 AM MST Tue Feb 21 2017

UTZ023-212300-
/O.NEW.KGJT.WS.A.0009.170222T1300Z-170224T0100Z/
Eastern Uinta Mountains-
425 AM MST Tue Feb 21 2017

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY AFTERNOON...

The National Weather Service in Grand Junction has issued a
Winter Storm Watch...which is in effect from Wednesday morning
through Thursday afternoon.

* LOCATIONS INCLUDE THE CITIES OF...Manila...Dutch John.

* TIMING...Scattered snow showers will develop overnight and
  increase in coverage on Wednesday. Heavy snow is possible
  Wednesday afternoon through Thursday, especially along north
  facing slopes.

* SNOW ACCUMULATION...6 to 12 inches possible with up to 16
  inches along north facing slopes west of Manila.

* WINDS...Northwest 10 to 20 mph with gusts up to 35 mph.

* IMPACTS...Travel and outdoor recreation may be impacted.
  Mountain roads and highways should be icy and snow packed with
  areas of blowing and drifting snow reducing visibility to under
  one mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
328 AM MST Tue Feb 21 2017

...HEAVY SNOW RETURNS TO THE MOUNTAINS OF SOUTHEAST WYOMING...

.Cold temperatures and snow will return to the area as early as
Tuesday night and Wednesday morning. Periods of snow are expected
through early Wednesday before snow becomes heavier and more
steady Wednesday afternoon. Significant snow accumulations are
expected across the mountains. This snowfall will also impact the
lower elevations of southeast Wyoming by early Thursday morning.

WYZ112-114-212330-
/O.NEW.KCYS.WS.A.0007.170222T1900Z-170224T1300Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
328 AM MST Tue Feb 21 2017

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
LATE THURSDAY NIGHT...

The National Weather Service in Cheyenne has issued a Winter
Storm Watch, which is in effect from Wednesday afternoon through
late Thursday night.

* TIMING...Periods of snow will begin tonight across the Sierra
  Madre and Snowy Ranges as a cold front moves into the area and
  stalls. Snowfall will become steady and heavier on Wednesday.

* TOTAL SNOW ACCUMULATIONS...12 to 18 inches with locally higher
  amounts across west and north facing slopes and ridges

* WINDS/VISIBILITY...Southwest 20 to 30 MPH with higher
  gusts...becoming north on Thursday. Visibilities below one half
  mile in falling snow and patchy blowing snow.

* IMPACTS...Mainly to travel and outdoor recreation. Mountain
  travel will be dangerous with slick snowpacked roads and low
  visibilities Wednesday through Thursday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow...sleet...or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.

&&

$$


Extreme Fire Danger


RANGELAND FIRE DANGER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
457 AM MST TUE FEB 21 2017

.DISCUSSION...SKIES WILL BE MOSTLY SUNNY TODAY WITH HIGHS IN THE
MID 60S TO MID 70S. WESTERLY WINDS WILL INCREASE TO 15 TO 30 MPH
ACROSS MUCH OF THE AREA LATE THIS MORNING AND AFTERNOON...WITH
HIGHER GUSTS. RELATIVE HUMIDITIES WILL DROP TO 20 TO 30 PERCENT IN
THE AFTERNOON...LOWEST VALUES ACROSS SOUTHERN SOUTH DAKOTA.

SDZ025>027-030-031-041-042-044-047-072>074-220215-
NORTHERN FOOT HILLS-RAPID CITY-SOUTHERN FOOT HILLS-
CUSTER CO PLAINS-PENNINGTON CO PLAINS-FALL RIVER-OGLALA LAKOTA-
BENNETT-TODD-STURGIS/PIEDMONT FOOT HILLS-SOUTHERN MEADE CO PLAINS-
HERMOSA FOOT HILLS-
INCLUDING THE CITIES OF SPEARFISH, RAPID CITY, EDGEMONT,
HOT SPRINGS, FOLSOM, WALL, ARDMORE, OELRICHS, PINE RIDGE, OGLALA,
KYLE, MARTIN, MISSION, STURGIS, UNION CENTER, AND HERMOSA
457 AM MST TUE FEB 21 2017 /557 AM CST TUE FEB 21 2017/

...EXTREME FIRE DANGER...

THE GRASSLAND FIRE DANGER INDEX WILL REACH THE EXTREME CATEGORY
THIS AFTERNOON. EXTREME WEATHER CONDITIONS OR A VERY LOW
MOISTURE CONTENT OF GRASSES...AND OTHER DRY ORGANIC MATERIAL
ON THE GROUND...INDICATE THAT CRITICAL BURNING CONDITIONS EXIST.
A FIRE WILL START EASILY AND HAS THE POTENTIAL TO BECOME LARGE
AND SPREAD QUICKLY BECOMING ERRATIC WITH EXTREME BEHAVIORAL
CHARACTERISTICS. NO OUTDOOR BURNING SHOULD TAKE PLACE.

THE OUTLOOK FOR WEDNESDAY AFTERNOON...THE GRASSLAND FIRE DANGER
INDEX WILL REACH THE HIGH CATEGORY TO VERY HIGH CATEGORY.


$$

RANGELAND FIRE DANGER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
457 AM MST TUE FEB 21 2017

.DISCUSSION...SKIES WILL BE MOSTLY SUNNY TODAY WITH HIGHS IN THE
MID 60S TO MID 70S. WESTERLY WINDS WILL INCREASE TO 15 TO 30 MPH
ACROSS MUCH OF THE AREA LATE THIS MORNING AND AFTERNOON...WITH
HIGHER GUSTS. RELATIVE HUMIDITIES WILL DROP TO 20 TO 30 PERCENT IN
THE AFTERNOON...LOWEST VALUES ACROSS SOUTHERN SOUTH DAKOTA.

SDZ001-012-043-046-049-220215-
HARDING-BUTTE-JACKSON-MELLETTE-TRIPP-
INCLUDING THE CITIES OF BUFFALO, BELLE FOURCHE, KADOKA,
WHITE RIVER, AND WINNER
457 AM MST TUE FEB 21 2017 /557 AM CST TUE FEB 21 2017/

...EXTREME FIRE DANGER...

THE GRASSLAND FIRE DANGER INDEX WILL REACH THE EXTREME CATEGORY
THIS AFTERNOON. EXTREME WEATHER CONDITIONS OR A VERY LOW
MOISTURE CONTENT OF GRASSES...AND OTHER DRY ORGANIC MATERIAL
ON THE GROUND...INDICATE THAT CRITICAL BURNING CONDITIONS EXIST.
A FIRE WILL START EASILY AND HAS THE POTENTIAL TO BECOME LARGE
AND SPREAD QUICKLY BECOMING ERRATIC WITH EXTREME BEHAVIORAL
CHARACTERISTICS. NO OUTDOOR BURNING SHOULD TAKE PLACE.

THE OUTLOOK FOR WEDNESDAY AFTERNOON...THE GRASSLAND FIRE DANGER
INDEX WILL REACH THE MODERATE CATEGORY TO VERY HIGH CATEGORY.


$$


Special Weather Statement


Special Weather Statement
National Weather Service Cheyenne WY
335 AM MST Tue Feb 21 2017

NEZ002-003-019>021-054-055-095-096-WYZ101>111-113-115>119-220000-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-Converse County Lower Elevations-
Niobrara County-North Laramie Range-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Upper North Platte River Basin-Laramie Valley-South Laramie Range-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
Including the cities of Chadron, Chadron St Park, Alliance,
Scottsbluff, Gering, Harrisburg, Angora, Bridgeport, Bayard,
Redington, Kimball, Brownson, Sidney, Harrison, Agate, Bill,
Douglas, Deer Creek, Glenrock, Lusk, Redbird, Garrett,
Seminoe Dam, Medicine Bow, Shirley Basin, Bordeaux, Wheatland,
Guernsey, Torrington, Rawlins, Arlington, Elk Mountain, Baggs,
Saratoga, Encampment, Bosler, Laramie, Buford, Pumpkin Vine,
Vedauwoo, Whitaker, Federal, Horse Creek, Cheyenne,
and Pine Bluffs
335 AM MST Tue Feb 21 2017

...SIGNIFICANT WINTER STORM WILL LIKELY IMPACT THE REGION FROM
LATE WEDNESDAY NIGHT THROUGH FRIDAY MORNING...

A significant winter storm is now looking very likely to impact a
large part of southeast Wyoming and the western Nebraska Panhandle
from late Wednesday night through Friday morning. This storm will
bring an abrupt end to the recent warmth, with widespread
significant snowfall accumulations possible. The strength and
location of the storm remain uncertain, and this will play a major
role in the exact placement of the heaviest snow. However, overall
confidence is rapidly increasing that portions of the area will
see very heavy snowfall with widespread amounts of 6 to 12 inches
possible for the lower elevations. In addition to the snow, north
to northeast winds of 15 to 20 MPH with gusts to 30 MPH could lead
to low visibility in falling and blowing snow on Thursday. This
storm has the potential to significantly impact travel across much
of the region. Winter Storm Watches will likely be required by
this afternoon as details on the specific location of heavier snow
become better refined. Stay tuned for additional details.

$$

CLH/TJT

Special Weather Statement
National Weather Service Riverton WY
256 AM MST Tue Feb 21 2017

WYZ013-023-221200-
Jackson Hole-Star Valley-
Including the cities of Jackson, Afton, Alpine,
Star Valley Ranch, and Thayne
256 AM MST Tue Feb 21 2017

...Rain changing to snow in Jackson Hole and the Star Valley
tonight...

Rain showers will continue today in the Jackson and Star Valleys,
with temperatures remaining in the middle 30s to near 40 degrees.
A cold front will quickly move southward over the area this
evening, changing the rain back over to snow. Slick, icy
patches could form tonight, especially for areas of standing
water. 1 to 3 inches will be possible during the overnight hours.
Light snow will continue Wednesday, with accumulations staying
under 1 inch.

$$

Special Weather Statement
National Weather Service Riverton WY
239 AM MST Tue Feb 21 2017

WYZ017-212000-
Wind River Basin-
Including the cities of Riverton and Shoshoni
239 AM MST Tue Feb 21 2017

Southwest winds between 20 and 30 mph with occasional gusts to 45
mph will be common today across the Wind River Basin. However, stronger
winds are expected in the Lander Foothills, Beaver Rim area, and
east into Natrona County where a high wind warning is in effect.

$$

21


Air Quality Alert


WYZ054-055-220000-

Air Quality Alert Message
Wyoming Air Quality Division
Relayed by the National Weather Service Rapid City SD
408 AM MST Tue Feb 21 2017

...BLOWING DUST HEALTH ALERT IN EFFECT FOR THE POWDER RIVER BASIN OF
NORTHEASTERN WYOMING UNTIL 500 PM THIS AFTERNOON...

Southwesterly winds will remain strong and gusty across much of the
basin through this afternoon. The strongest winds will generally be
around and south of Gillette. Sustained wind speeds will mostly be
25 to 40 mph, with gusts up to 60 mph. Wind speeds will decrease late
this afternoon and early evening.

The Wyoming Air Quality Division recommends the elderly, young
children, and individuals with respiratory problems avoid
excessive physical exertion and minimize outdoor activities during
this time. Although these people are most susceptible to health
impacts, the air quality division also advises that everyone
should avoid prolonged exposure to the poor air quality
conditions.

$$


Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Cheyenne WY
553 AM MST Tue Feb 21 2017

WYZ101>119-221300-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
553 AM MST Tue Feb 21 2017

This hazardous weather outlook is for portions of east central
Wyoming...south central Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Strong westerly winds with gusts between 55 to 65 MPH will
continue today across most of southeast Wyoming before diminishing
early this evening. High Wind Warnings remain in effect for most
of southeast Wyoming. Can not rule out gusts around 70 MPH along
and east of the Interstate 25 corridor.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Widespread accumulating snow with gusty winds is expected
beginning Wednesday night and possibly continuing through early
Friday. There is increasing confidence that significant snow
accumulations will occur across a good portion of southeast
Wyoming. Significant travel impacts are expected Thursday and
Friday.

.Spotter information statement...

Spotter activation will not be required at this time.

$$

Hazardous Weather Outlook
National Weather Service Cheyenne WY
553 AM MST Tue Feb 21 2017

NEZ002-003-019>021-054-055-095-096-221300-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-
553 AM MST Tue Feb 21 2017

This hazardous weather outlook is for portions of western
Nebraska.

.DAY ONE...TODAY AND TONIGHT

A period of very windy conditions are expected today across
western Nebraska with westerly winds gusting between 45 to 55
MPH late this morning and this afternoon. Travelers with light
weight or high profile vehicles are urged to use caution.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Widespread accumulating snow is expected beginning on Thursday
and possibly continuing through late Friday. There is increasing
confidence that significant snow accumulations will occur across a
good portion of western Nebraska, especially the northern
panhandle. Significant travel impacts are expected Thursday and
Friday.

.Spotter information statement...

Spotter activation will not be required at this time.

$$

Hazardous Weather Outlook
National Weather Service Rapid City SD
550 AM MST Tue Feb 21 2017

SDZ024-028-029-WYZ054>058-071-221400-
Northern Black Hills-Central Black Hills-Southern Black Hills-
Northern Campbell-Southern Campbell-Western Crook-
Wyoming Black Hills-Weston-Northeastern Crook-
550 AM MST Tue Feb 21 2017

This Hazardous weather outlook is for portions of the Black Hills
of South Dakota...northeast Wyoming...AND the black hills of
Wyoming.

.DAY ONE...TODAY AND TONIGHT

Gusty southwest winds will continue through today, with gusts of
50 to 60 mph possible over northeast Wyoming. With warm
temperatures, low humidity, and cured fuels, any fires that
develop could rapidly spread.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

A winter storm will affect the region from late Wednesday night
into Friday morning. With the currently projected track of the
winter storm, much of the region will see some accumulating snow.
The greatest snowfall amounts, around 6 inches, are currently
expected over southern portions of Campbell and Weston counties in
northeastern Wyoming into southwestern, and parts of south
central, South Dakota. The main timeframe for snow appears to be
from late Wednesday night through Thursday night, ending on
Friday morning. Much uncertainty remains on the strength, timing
and path of this winter storm, so refer to upcoming forecasts for
further details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

$$

Hazardous Weather Outlook
National Weather Service Rapid City SD
550 AM MST Tue Feb 21 2017

SDZ001-002-012>014-025>027-030>032-041-042-044-047-072>074-221400-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Foot Hills-Rapid City-Southern Foot Hills-
Custer Co Plains-Pennington Co Plains-Haakon-Fall River-
Oglala Lakota-Bennett-Todd-Sturgis/Piedmont Foot Hills-
Southern Meade Co Plains-Hermosa Foot Hills-
550 AM MST Tue Feb 21 2017 /650 AM CST Tue Feb 21 2017/

This Hazardous weather outlook is for portions of south central
South Dakota...AND western South Dakota.

.DAY ONE...TODAY AND TONIGHT

Dry, warm and breezy conditions are expected today. The grassland
fire danger will be in the very high to extreme category.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

A winter storm will affect the region from late Wednesday night
into Friday morning. With the currently projected track of the
winter storm, much of the region will see some accumulating snow.
The greatest snowfall amounts, around 6 inches, are currently
expected over southern portions of Campbell and Weston counties in
northeastern Wyoming into southwestern, and parts of south
central, South Dakota. The main timeframe for snow appears to be
from late Wednesday night through Thursday night, ending on Friday
morning. Much uncertainty remains on the strength, timing and
path of this winter storm, so refer to upcoming forecasts for
further details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

$$

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
537 AM MST Tue Feb 21 2017

UTZ001>016-019>021-517-518-WYZ021-221300-
Cache Valley/Utah Portion-Northern Wasatch Front-
Salt Lake and Tooele Valleys-Southern Wasatch Front-
Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys-
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Western Uinta Basin-Castle Country-San Rafael Swell-
Sanpete/Sevier Valleys-West Central Utah-Southwest Utah-
Utahs Dixie and Zion National Park-South Central Utah-
Glen Canyon Recreation Area/Lake Powell-Central Mountains-
Southern Mountains-Southwest Wyoming-
537 AM MST Tue Feb 21 2017

This Hazardous Weather Outlook is for the western two thirds of
Utah and southwest Wyoming.

.DAY ONE...Today and Tonight

Local flooding from snow melt will persist today across the far
northern portions of the outlook area in valleys with remaining
snow pack.

Strong south winds will continue into tonight across the
mountains and the western valleys, with gusts in excess of 50 mph.

Valley rain and mountain snow will become widespread across the
northern outlook area late this afternoon shifting south tonight
along a cold front. Snow levels will lower to the valley floors
tonight from about Salt Lake City north.

Significant snow accumulation is expected in the northern
mountains tonight with winter driving conditions across the
passes. Little if any accumulation is forecast for the valleys.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Precipitation will taper off Wednesday morning but valley rain
and snow along with mountain snow will become more widespread
across the northern and central outlook area again late Wednesday
afternoon continuing into Thursday. Snow will spread into the
valleys of central Utah with accumulating snow possible along much
of the I-15 corridor by Thursday morning. Winter driving
conditions will impact travel at times across much of the
northern and central outlook area Wednesday night through
Thursday morning.

Cold unsettled weather will continue across the outlook area into
the weekend.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

$$

For more information from NOAA/s National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential road travel impacts visit...
http://www.udottraffic.utah.gov/roadweatherforecast.aspx

Hazardous Weather Outlook
National Weather Service Grand Junction CO
521 AM MST Tue Feb 21 2017

COZ001>014-017>023-UTZ022>025-027>029-221300-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-
Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide-
Northwest San Juan Mountains-Southwest San Juan Mountains-
Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
521 AM MST Tue Feb 21 2017

This hazardous weather outlook is for eastern Utah and western
Colorado.

.DAY ONE...Today and Tonight

Isolated to scattered snow showers can be expected over the
higher mountains through tonight. No significant accumulations are
expected through this period. Breezy to windy conditions will also
develop by this afternoon with temperatures climbing up to 15
degrees above seasonal normals.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There is a good chance for valley rain showers and mountain snow
showers each afternoon and evening as a series of moist Pacific
storms pass through. Colder air moving in may flip the valleys
over to all snow by Thursday morning. Expect moderate to heavy
snow accumulations for the mountains with light accumulating snow
in the valleys Thursday. A brief break will arrive Friday and
Saturday, although more rain and snow arrives Sunday and will be
sticking around through Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
431 AM MST Tue Feb 21 2017

COZ030>051-221145-
JACKSON COUNTY BELOW 9000 FEET-
WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-
GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-
SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/
GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-
CENTRAL AND SOUTHEAST PARK COUNTY-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-
SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-
LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY-
431 AM MST Tue Feb 21 2017

...RED FLAG WARNING IN EFFECT FROM 11 AM TO 6 PM MST TODAY FOR
WIND AND LOW RELATIVE HUMIDITY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

The combination of record breaking temperatures and very strong
west winds will result in red flag warning conditions for areas
east of the mountains below 7500 feet elevation, all the way to
the Kansas border. Occasional gusts to 75 mph will be possible in
and near the foothills through midday. East of Interstate 25
winds could gust to 40 mph today. Winds will gradually subside
this evening.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A change in the weather, back to more winter-like conditions, is
expected to move in to the forecast area on Wednesday. Snow will
become likely in the mountains on Wednesday and continue through
Friday, with a chance of snow after that all weekend on into
early next week. The Plains can expected a chance of snow late
Wednesday night into Friday, with a good chance Thursday and
Thursday evening. Snow accumulations for all the forecast area are
not expected to be significant with this storm. Temperatures will
be above normal on Wednesday, but below seasonal normals Thursday
into Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be required today or tonight.

Schlatter/RJK

$$

Hazardous Weather Outlook
National Weather Service Billings MT
311 AM MST Tue Feb 21 2017

MTZ028>042-056>058-063>068-WYZ098-099-221015-
Southern Wheatland-Musselshell-Treasure-Northern Rosebud-Custer-
Fallon-Northern Stillwater-Yellowstone-Powder River-Carter-
Southern Big Horn-Eastern Carbon-Northern Park-
Northern Sweet Grass-Golden Valley-Red Lodge Foothills-
Northern Big Horn-Southern Rosebud-Judith Gap-Paradise Valley-
Livingston Area-Beartooth Foothills-Absaroka/Beartooth Mountains-
Crazy Mountains-Northeast Bighorn Mountains-Sheridan Foothills-
311 AM MST Tue Feb 21 2017

This Hazardous Weather Outlook is for portions of central
Montana...south central Montana...southeast Montana and north
central Wyoming.

* Winds: Strong southwest to west winds will impact much of the
  region today, with peak gusts in the late morning and afternoon.
  Strong west winds will be along the eastern slopes of the
  mountains. Expect hazardous cross winds on area highways.

* Mountain Snow: Accumulating snowfall will continue over the
  Beartooth Absaroka Mountains today. This snowfall may increase
  avalanche danger in the high country.

* Significant Weather Change: Colder weather will return to the
  region during the latter half of the week, with below normal
  temperatures expected Thursday through the weekend. Some snow
  accumulation is also possible, but details remain highly
  uncertain at this time.

* Potential Wintry Impacts: Poor driving conditions. Hazardous
  conditions for young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be sure to stay tuned for future updates as locations, timing, and
impacts could change. Begin preparations to mitigate any impacts
that could result from the hazardous weather.

&&

$$

Hazardous Weather Outlook
National Weather Service Riverton WY
152 AM MST Tue Feb 21 2017

WYZ001>020-022>030-221300-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
152 AM MST Tue Feb 21 2017

...Flood Warning remains in effect for the Big Horn River roughly
between Manderson and Greybull through at least Wednesday
Morning...

...Winter Storm Warning for the Western Mountains through Tonight...

...Multiple High Wind Warnings for areas east of the Divide
through this evening...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Ice jam flooding continues across portions of the Big Horn Basin
especially along the Big Horn River in Big Horn County.

Significant snow and blowing snow will continue over the western
mountains through tonight. Please see the winter storm warning
for more details. Rain, and or snow in the western valleys will
change to all snow as a cold front sweeps across western Wyoming
late this afternoon into the early evening.

Strong to high wind will continue across portions of central
Wyoming east of the Continental Divide through this evening.
These winds will also develop this morning across the eastern
slopes of the Bighorns and Johnson County. Please see the high
wind warnings for more details.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Late Wednesday Night Through Thursday Night...Significant snow
possible in central Wyoming along with breezy conditions causing
blowing and drifting snow.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report any river or creek flooding, as
well as snowfall amounts. Thank you!

$$

Team Riverton

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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