Winter Weather Warnings / Watches / Advisories
Issued by NWS Riverton, WY

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WWUS45 KRIW 230355
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
855 PM MST Wed Feb 22 2017

...Heavy snow and strong wind impact much of Central and Southern
Wyoming tonight through mid day Friday...

.A very strong winter storm is expected to move into Southern
Wyoming tonight and stall out during the day before slowly
winding down and shifting east of the area later Friday. The
heaviest snow for most areas will be later tonight through
Thursday. This storm system will also be accompanied by strong
winds in many areas with blizzard conditions expected along
Interstate 80 east of Rock Springs...over South Pass and in the
Jeffrey City...Sweetwater Station area later tonight through
Thursday.

WYZ014-015-231200-
/O.CON.KRIW.BZ.W.0001.170223T0600Z-170224T1800Z/
Wind River Mountains West-Wind River Mountains East-
855 PM MST Wed Feb 22 2017

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 11 AM MST FRIDAY...

* Timing...Snow will spread across the range late this evening...and
become heavy at times from the predawn hours Thursday through
Thursday evening. Snow will continue through Thursday night...
before subsiding by mid day Friday.

* Snowfall...10 to 15 inches are expected...mainly on the
  southern end of the mountains.

* WINDS/VISIBILITY...Northeast will increase overnight to 35 to
  45 mph with gusts 55 to 65 mph causing blizzard conditions and
  zero visibility through at least Thursday evening. Winds will
  gradually decrease later Thursday night into Friday morning.

* Main impact...Travel will become difficult to impossible
  across South Pass due to the snow producing slick...
  snow-packed roads...and whiteout conditions due to strong
  northeast winds developing early Thursday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions...making travel extremely dangerous. Do not travel. If
you must travel...have a winter survival kit with you. If you get
stranded...stay with your vehicle.

&&

$$

WYZ030-231200-
/O.CON.KRIW.BZ.W.0001.000000T0000Z-170224T1800Z/
East Sweetwater County-
Including the city of Wamsutter
855 PM MST Wed Feb 22 2017

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 11 AM MST FRIDAY...

* TIMING...Snow will rapidly increase across the area late this
  evening...becoming heavy at times overnight and continuing
  through Thursday. Light to moderate snow will continue into
  Friday morning. The heaviest snowfall and strongest wind should
  occur between the predawn hours Thursday and Thursday evening.

* SNOWFALL...8 to 15 inches with the heavier amounts along and
  north of Interstate 80.

* WINDS/VISIBILITY...Northwest to north wind increasing
  overnight to 30 to 40 mph with gusts 50 to 60 mph causing
  blizzard conditions and zero visibility from early Thursday
  through Thursday evening before gradually tapering off later
  Thursday night and Friday.

* Main impact...Travel may become nearly impossible due to the
  heavy snow...very strong wind and near zero visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions...making travel extremely dangerous. Do not travel. If
you must travel...have a winter survival kit with you. If you get
stranded...stay with your vehicle.

&&

$$

WYZ019-231200-
/O.CON.KRIW.BZ.W.0001.170223T0600Z-170224T1800Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
855 PM MST Wed Feb 22 2017

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 11 AM MST FRIDAY...

* TIMING...Snow will rapidly spread across the area late this
  evening...and may become heavy at times from the predawn hours
  Thursday through early Thursday evening. Snow will continue into
  Friday morning before tapering off to flurries.

* SNOWFALL...12 to 18 inches.

* WINDS/VISIBILITY...Becoming Northeast 30 to 40 mph with gusts
  over 50 mph causing blizzard conditions later tonight through
  Thursday evening. Visibilities will be near zero at times.
  Winds will start to decrease later Thursday night into Friday
  morning.

* Main impact...Travel may become nearly impossible due to the
  heavy snow...very strong wind and near zero visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Blizzard Warning means severe winter weather conditions are
expected or occurring. Falling and blowing snow with strong winds
and poor visibilities are likely. This will lead to whiteout
conditions...making travel extremely dangerous. Do not travel. If
you must travel...have a winter survival kit with you. If you get
stranded...stay with your vehicle.

&&

$$

WYZ020-022-231200-
/O.CON.KRIW.WS.W.0009.170223T0600Z-170224T1800Z/
Natrona County Lower Elevations-Casper Mountain-
Including the city of Casper
855 PM MST Wed Feb 22 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* TIMING...Snow will develop tonight, and become heavy at times
  from the predawn hours Thursday through Thursday evening. Snow
  will continue through Thursday night, before subsiding by mid
  day Friday.

* SNOWFALL ACCUMULATION...Ranging from up to 2 feet on Casper
  Mountain, with 12 to 16 inches across Natrona County.

* Wind and Visibility...Northeast 20 to 30 mph with gusts over
  40 mph in open areas causing visibilities under one quarter
  mile at times due to snow falling and blowing around.

* MAIN IMPACT...Roads will become slick and snow covered. Gusty
  northeast winds will develop early Thursday morning, causing
  blowing and drifting snow. This could significantly reduce
  visibility and make travel difficult to impossible.

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.

&&

$$

WYZ010-011-231200-
/O.CON.KRIW.WS.W.0009.170223T1200Z-170224T1800Z/
Northeast Johnson County-Southeast Johnson County-
Including the cities of Buffalo and Kaycee
855 PM MST Wed Feb 22 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM THURSDAY TO
11 AM MST FRIDAY...

* TIMING...Snow will increase overnight with snow heavy at times
  Thursday into Thursday evening before gradually decreasing into
  Friday morning.

* SNOWFALL ACCUMULATION...5 to 9 inches with the heavier amounts
  generally in the south half of the county.

* Wind and Visibility...North 25 to 35 mph with gusts around 50
  mph causing considerable blowing and drifting snow and near
  zero visibility at times.

* MAIN IMPACT...Roads will become slick and snow covered. Strong
  north wind will cause blowing and drifting snow Thursday. The
  visibility will become significantly reduced in blowing snow.

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.

&&

$$

WYZ017-018-231200-
/O.CON.KRIW.WS.W.0009.170223T0600Z-170224T1800Z/
Wind River Basin-Lander Foothills-
Including the cities of Riverton, Shoshoni, and Lander
855 PM MST Wed Feb 22 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* TIMING...Snow will develop overnight, and become heavy at times
  from the predawn hours Thursday through Thursday evening before
  gradually tapering off into Friday morning.

* SNOWFALL ACCUMULATION...12 to 18 inches in Eastern Fremont
  County, 10 to 12 inches in the Riverton/Lander area, and 3 to
  5 inches around Kinnear and Pavillion. There is some potential
  for even higher amounts depending on the exact track of the
  storm Thursday.

* Wind and visibility...North 20 to 30 mph with gusts around 40
  mph in open areas creating blowing and drifting snow and
  visibilities under one quarter mile at times.

* MAIN IMPACT...Roads will become slick and snow covered.
  Blowing and drifting snow may significantly reduce visibility
  and could make travel rather difficult. Careful footing is
  advised as there will likely be hidden patched of ice and deep
  puddles of water beneath the fresh snow cover.

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.

&&

$$

WYZ028-029-231200-
/O.CON.KRIW.WS.W.0009.000000T0000Z-170224T1800Z/
Rock Springs and Green River-Flaming Gorge-
Including the cities of Rock Springs and Green River
855 PM MST Wed Feb 22 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* TIMING...Snow will rapidly increase across the area late this
  evening. The heaviest snowfall should occur between the predawn
  hours Thursday and through Thursday evening. Snow will continue
  Thursday night, before subsiding by midday Friday.

* SNOWFALL ACCUMULATION...Ranging from 5 to 8 inches.

* Visibility and wind...North to northwest 15 to 25 mph with
  gusts to 40 mph in open areas creating areas of blowing and
  drifting snow and visibilities under one quarter mile at
  times.

* MAIN IMPACT...Roads, including Interstate 80, will become
  slick and snow covered. Considerable blowing and drifting snow
  could make travel difficult in blowing and drifting snow

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.

&&

$$

WYZ007-231200-
/O.CON.KRIW.WS.W.0009.170223T0600Z-170224T1800Z/
Owl Creek and Bridger Mountains-
855 PM MST Wed Feb 22 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* TIMING...Snow will develop tonight, and may become heavy at
  times from the predawn hours Thursday through Thursday
  evening. Snow will continue through Thursday night, before
  subsiding by mid day Friday.

* SNOWFALL ACCUMULATION...6 to 12 inches, with the higher
  amounts expected over the Bridger Mountains.

* MAIN IMPACT...Roads will become slick and snow covered.
  Blowing and drifting snow could make travel rather difficult,
  including travel through the Wind River Canyon. Blowing snow
  may significantly reduce visibility, especially at the
  southern end of the Wind River Canyon.

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.

&&

$$

WYZ009-231200-
/O.CON.KRIW.WW.Y.0011.170223T1200Z-170224T1800Z/
Bighorn Mountains Southeast-
855 PM MST Wed Feb 22 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM THURSDAY
TO 11 AM MST FRIDAY...

* TIMING...Snow will increase from the south by dawn Thursday and
  continue into Friday morning. The heaviest snowfall will likely
  occur through Thursday evening.

* SNOWFALL ACCUMULATION...8 to 12 inches near Powder River Pass
  and over the southern end of the mountains.

* MAIN IMPACT...Road will may become slick and snow covered.
  Gusty north winds could cause blowing and drifting snow
  Thursday. The visibility may become significantly reduced in
  blowing snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter weather advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
and slick roads with limited visibilities. Slow down, and allow
extra time to reach your destination. Check the latest road
conditions at wyoroad.info or by dialing 5 1 1.

&&

$$

WYZ005-231200-
/O.CON.KRIW.WW.Y.0011.170223T1200Z-170224T1800Z/
Southwest Big Horn Basin-
Including the city of Thermopolis
855 PM MST Wed Feb 22 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM THURSDAY
TO 11 AM MST FRIDAY...

* TIMING...Snow will develop quickly by dawn Thursday and
  continue into Friday morning. The best snowfall rates will
  likely be Thursday into Thursday evening.

* Snowfall...3 to 6 inches.

* Wind and Visibility...North 15 to 25 mph with gusts up to 35
  mph creating areas of blowing and drifting snow and
  visibilities under one half mile at times.

* MAIN IMPACT...Road will may become slick and snow covered.
  Gusty north winds could cause blowing and drifting snow
  Thursday. The visibility may become significantly reduced in
  blowing snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter weather advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
and slick roads with limited visibilities. Slow down, and allow
extra time to reach your destination. Check the latest road
conditions at wyoroad.info or by dialing 5 1 1.

&&

$$

WYZ003-231200-
/O.CON.KRIW.WW.Y.0011.170223T1200Z-170224T1800Z/
Cody Foothills-
Including the cities of Cody and Meeteetse
855 PM MST Wed Feb 22 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM THURSDAY
TO 11 AM MST FRIDAY...

* TIMING...Snow will develop quickly by dawn Thursday and
  continue into Friday morning. The best snowfall rates will
  likely be Thursday into Thursday evening.

* Snowfall...3 to 6 inches with the heaviest amounts from around
  Meeteetse south.

* Wind and Visibility...North 20 to 30 mph with gusts to 40 mph
  creating areas of blowing and drifting snow and visibilities
  under one half mile at times.

* MAIN IMPACT...Road will may become slick and snow covered.
  Gusty north winds could cause blowing and drifting snow
  Thursday. The visibility may become significantly reduced in
  blowing snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter weather advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
and slick roads with limited visibilities. Slow down, and allow
extra time to reach your destination. Check the latest road
conditions at wyoroad.info or by dialing 5 1 1.

&&

$$


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