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Winter Weather Advisory


URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
350 PM MDT Wed Mar 22 2017

...Springtime Winter Storm to Bring Periods of Moderate to
Occasionally Heavy Snow to the Wind River and Bighorn Mountains...

.A strong upper level disturbance with copious amounts of Pacific
moisture will bring periods of moderate to occasionally heavy wet
snow to the Wind River and Bighorn mountains through Thursday
night.

WYZ008-009-231400-
/O.CON.KRIW.WW.Y.0016.170323T0600Z-170324T0600Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
350 PM MDT Wed Mar 22 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO MIDNIGHT MDT THURSDAY NIGHT...

* TIMING...Periods of snow, moderate to heavy at times, will begin
  above 10000 feet after midnight tonight...dropping to around
  6500 feet by Thursday morning.

* Snow Accumulations...total event accumulations of 6 to 12
  inches, with the highest amounts generally above 8000 feet.

* MAIN IMPACT...Roads, including Powder River and Granite Pass, will
  be slick, slushy or snow covered with limited visibility in
  snow at times.

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.

&&

$$


Winter Storm Watch


URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver/Boulder CO
358 PM MDT Wed Mar 22 2017

...Winter Storm Watch for the mountains, southern foothills and
Palmer Divide from midnight Thursday night to noon on Friday...

A spring storm will bring much needed precipitation to northeast
and north central Colorado. Precipitation is expected to develop
across the forecast area on Thursday. Decent snowfall is possible
over the mountains, foothills and Palmer Ridge Thursday night into
Friday morning. Hazardous driving conditions will develop in
these areas.

COZ033-034-036-041-230600-
/O.NEW.KBOU.WS.A.0007.170324T0000Z-170324T1800Z/
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-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Including the cities of Cameron Pass,
Laramie and Medicine Bow Mountains, Rabbit Ears Range,
Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass,
Breckenridge, East Slopes Mosquito Range,
East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks,
Kenosha Mountains, Mount Evans, Williams Fork Mountains,
Winter Park, Bailey, Central City, Evergreen, Georgetown,
Idaho Springs, Westcreek, Castle Rock, Elbert, Fondis, Kiowa,
and Larkspur
358 PM MDT Wed Mar 22 2017

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

The National Weather Service in Denver has issued a Winter Storm
Watch in effect from late Thursday evening through Friday
morning.

* TIMING...Snow will increase in intensity over the mountains,
  southern foothills and Palmer Ridge late Thursday evening into
  Friday morning. The heaviest snowfall is likely from just after
  midnight Thursday night to just after dawn Friday morning.

* SNOW ACCUMULATIONS...7 to 15 inches over the high mountains and
  southern foothills with 6 to 11 inches over the Palmer Ridge.
  Snowfall rates up to two inches per hour are possible in the
  mountains and southern foothills early Friday morning.

* WIND/VISIBILITY...Northerly winds are expected at 30 mph with
  gusts to 45 mph over the Palmer Ridge late Thursday night and
  Friday morning. Speeds will be much lighter in the mountains and
  foothills with gusts up to 20 mph at best. Visibilities could be
  under one quarter of a mile in the windiest areas.

* IMPACTS...Heavy snow, strong winds and poor visibilities will
  create hazardous winter driving conditions. Roads will be icy
  and snow packed.

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
317 PM MDT Wed Mar 22 2017

...STRONG LOW PRESSURE SYSTEM TO AFFECT THE REGION LATE THURSDAY
INTO FRIDAY...

WYZ116-117-231030-
/O.NEW.KCYS.WS.A.0009.170324T0300Z-170324T1500Z/
South Laramie Range-South Laramie Range Foothills-
Including the cities of Buford, Pumpkin Vine, Vedauwoo, Whitaker,
Federal, and Horse Creek
317 PM MDT Wed Mar 22 2017

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

The National Weather Service in Cheyenne has issued a Winter
Storm Watch, which is in effect from Thursday evening through
Friday morning.

* TIMING...Mainly from mid-evening Thursday into Friday morning.

* TOTAL SNOW ACCUMULATIONS...Generally from 4 to 6 inches with
  locally higher amounts.

* WINDS/VISIBILITY...Northerly winds from 15 to 30 mph with gusts
  over 40 mph. Visibilities under a half mile at times with some
  blowing snow possible as well.

* IMPACTS...Mostly to travel due to the snow and wind potentially
  producing very low visibilities and snow-covered roads...
  especially around the Interstate 80 summit area.

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.

&&

$$


Special Weather Statement


Special Weather Statement
National Weather Service Grand Junction CO
413 PM MDT Wed Mar 22 2017

COZ001>014-017>023-UTZ022>025-027>029-231300-
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-
Including the cities of Rangely, Dinosaur, Craig, Hayden, Meeker,
Rio Blanco, Columbine, Hahns Peak, Toponas, Steamboat Springs,
Grand Junction, Fruita, Palisade, Collbran, De Beque, New Castle,
Mesa, Parachute, Rifle, Silt, Eagle, Edwards, Glenwood Springs,
Carbondale, Basalt, Skyway, Aspen, Vail, Snowmass, Montrose,
Hotchkiss, Delta, Crested Butte, Taylor Park, Marble, Buford,
Trappers Lake, Gunnison, Cimarron, Ridgway, Glade Park,
Telluride, Ouray, Lake City, Silverton, Rico, Hesperus, Gateway,
Nucla, Cortez, Dove Creek, Mancos, Durango, Bayfield, Ignacio,
Pagosa Springs, Blanding, Bluff, Mexican Hat, Manila, Dutch John,
Vernal, Jensen, Ballard, Fort Duchesne, Randlett, Moab,
Castle Valley, Thompson Springs, Monticello,
Canyonlands National Park, Dead Horse Point State Park,
and Fry Canyon
413 PM MDT Wed Mar 22 2017

...Near Record Warmth Will Come To An End Tonight As An Early
Spring Storm Brings A Return To Winter-Like Conditions...

Warmer than normal temperatures and breezy to windy conditions
will continue through this evening, before a strong Pacific storm
moves across the area tomorrow morning through Friday morning.
This storm will bring a dramatic change back to winter-like
conditions after an extended period of near record warmth.

Mainly rain showers and some thunderstorms will precede the
frontal passage, then much colder air will sweep through the area
late tomorrow afternoon and evening. Snow levels will start at
9000 to 10,000 feet tonight then lower to between 6000 and 7000
feet by tomorrow night into Friday morning.

Significant snowfall is a possibility with this storm, initially
only over the higher mountains above 8000 to 9000 feet tomorrow
afternoon, but quickly lowering to envelop most mountain passes,
then reaching some valley bottoms late tomorrow night into early
Friday morning. Valley accumulations will be limited.

If you plan to travel through the mountains late this week, be
prepared for rapidly changing weather conditions, with hazardous winter
driving conditions possible beginning tomorrow morning and
continuing through Friday morning. Stay tuned to your favorite
media outlet and NOAA weather radio, and check weather and road
conditions before traveling.

$$
$$

Special Weather Statement
National Weather Service Riverton WY
408 PM MDT Wed Mar 22 2017

WYZ020-022-231000-
Natrona County Lower Elevations-Casper Mountain-
Including the city of Casper
408 PM MDT Wed Mar 22 2017

A developing storm system moving into the Great Basin today will
aid in a good chance of showers and isolated thunderstorms this
afternoon and evening with showers continuing Thursday. The higher
parts of Casper Mountain may change to snow on Thursday. As
colder air moves in Thursday evening the Casper area will likely
change over to snow with from a half inch to two inches possible
by Thursday night. Casper Mountain may see as much as 2 to 3
inches.

$$

Special Weather Statement
National Weather Service Riverton WY
408 PM MDT Wed Mar 22 2017

WYZ002-003-007-231000-
Absaroka Mountains-Cody Foothills-Owl Creek and Bridger Mountains-
Including the cities of Cody and Meeteetse
408 PM MDT Wed Mar 22 2017

An approaching storm system will bring widespread showers to the
area tonight with mountain snow and the possibility of rain
changing to snow across the lower elevations, especially above
5000 feet. The highest probability for the snow besides the
mountainous locations will be the area from south of Cody to
Grass Creek Divide. The southern part of the Absarokas may see 3
to 7 inches with local amounts to 8 inches. The Cody Foothills
could see 1 to 4 inches on Thursday into Thursday evening.


$$

Special Weather Statement
National Weather Service Riverton WY
408 PM MDT Wed Mar 22 2017

WYZ010-011-231000-
Northeast Johnson County-Southeast Johnson County-
Including the cities of Buffalo and Kaycee
408 PM MDT Wed Mar 22 2017

A new storm system will move into the Great Basin today and
spread showers northeastward tonight. A good chance of rain will
continue through Thursday with snow possible in the foothills.
The lower elevations will likely change to snow for a few hours by
Thursday evening with light accumulation of a skiff to an inch or
less possible.

$$


Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Grand Junction CO
338 PM MDT Wed Mar 22 2017

COZ001>014-017>023-UTZ022>025-027>029-232145-
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-
338 PM MDT Wed Mar 22 2017

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

.DAY ONE...This Afternoon and Tonight

Clouds will thicken this afternoon with a few showers developing
over the higher terrain. In the valleys, windy and dry conditions
will require a heightened awareness of fire weather conditions
until after sunset.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thursday through Thursday night...a strong Pacific storm will
bring increasing rain and snow to the higher elevations above 8000
feet in eastern Utah and western Colorado. The best chance of
precipitation will be on Thursday morning. There is the potential
for hazardous winter driving conditions over the high mountain
passes.

Friday and Saturday...Precipitation will decrease from west to
east around midnight on Friday with scattered rain and snow
showers ending in the Colorado mountains Friday morning. Saturday
should be drier but becoming breezy.

Sunday and Tuesday...Another series of Pacific storm systems will
move through the area bringing a continued potential for more
winter weather and hazardous driving conditions over the mountain
passes.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Cheyenne WY
1240 PM MDT Wed Mar 22 2017

WYZ104-105-109>115-231000-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Sierra Madre Range-
Upper North Platte River Basin-Snowy Range-Laramie Valley-
1240 PM MDT Wed Mar 22 2017

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

Isolated weak thunderstorms are possible this afternoon.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Isolated thunderstorms will be possible Thursday afternoon with
the passage of a cold front. No severe weather is expected.

A strong Pacific low pressure system will track east across the
central Rockies late Thursday into Friday. This system will bring
colder temperatures and widespread rain and snow, along with gusty
winds. There is still uncertainty in the track of the storm and
the timing of rain changing to snow, which will be a major factor
in snowfall amounts and the potential impacts. At this time, the
best chance for significant snowfall accumulations will be above
6000 feet, including the mountains. If you have travel plans
across southeast Wyoming late this week, please monitor the latest
forecast information over the next couple days for more details
on this potential winter storm.

.Spotter information statement...

Spotter activation will not be needed.

$$

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1105 AM MDT Wed Mar 22 2017

COZ030>051-231715-
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-
1105 AM MDT Wed Mar 22 2017

...Red Flag Warning for critical fire weather conditions Thursday
afternoon for the southern foothills...Palmer Divide and adjacent
plains including Denver and areas east and southeast...
...Rain and snow on the way Thursday night into Friday...

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

.DAY ONE...TODAY AND TONIGHT

Today will be warm and breezy in most areas, with low humidity
leading to an elevated fire danger in areas west and southwest of
Denver.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Strong southwesterly winds combined with low humidity will bring
critical fire weather conditions along the southern foothills,
Palmer Divide and over portions of the northeast plains in the
afternoon. Rain and snow showers will develop in the mountains
Thursday afternoon with a slight chance of some thunderstorms over
the northeast plains, strongest closer to the Kansas border.

Thursday night through Friday, a storm system is expected to
track slowly across Colorado. This system will bring much needed
precipitation to the region. Moderate to heavy snow will be
possible in the Front Range Mountains, Foothills and Palmer
Divide above 6500 feet, with widespread rain or a mix of rain and
snow over the northeast plains. The Front Range Mountains east of
the Continental Divide and higher foothills could see up to a foot
of snowfall by Friday afternoon, with 3 to 6 inches of snow
over the Palmer Divide, and periods of moderate to heavy rainfall
across the northeastern plains.

Precipitation will diminish Friday night with dry and warmer
weather on Saturday. The next system could bring another chance of
precipitation to the region on Sunday, then drier again Sunday
night into Monday.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

$$
Schlatter/Kriederman

Hazardous Weather Outlook
National Weather Service Rapid City SD
531 AM MDT Wed Mar 22 2017

SDZ014-026-027-030>032-041>044-046-047-049-073-074-231300-
Ziebach-Rapid City-Southern Foot Hills-Custer Co Plains-
Pennington Co Plains-Haakon-Fall River-Oglala Lakota-Jackson-
Bennett-Mellette-Todd-Tripp-Southern Meade Co Plains-
Hermosa Foot Hills-
531 AM MDT Wed Mar 22 2017 /631 AM CDT Wed Mar 22 2017/

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

.DAY ONE...Today and Tonight

The grassland fire danger index will be in the very high category
this afternoon. Much warmer air will build back into the area
today, with gusty southerly winds developing during the morning.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

No hazardous weather is expected at this time.

.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 Riverton WY
240 AM MDT Wed Mar 22 2017

WYZ001>020-022>030-231100-
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-
240 AM MDT Wed Mar 22 2017

...FLOOD WATCH IN EFFECT FOR PORTIONS OF WESTERN WYOMING THROUGH
WEDNESDAY NIGHT...

...WINTER WEATHER ADVISORY FOR THE WIND RIVER AND BIGHORN MOUNTAINS
FROM THIS EVENING THROUGH THURSDAY EVENING...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Minor flooding may occur along creeks, streams, and low-lying
areas across western and southwest Wyoming below 7500 feet. Please
see Flood Watch for details.

Light to moderate snow possible for the higher elevations of the mountains
today...increasing with snow levels lowering tonight.

Isolated thunderstorms possible across portions of central and
southern this afternoon and early evening. A few storms could be
strong with small hail and gusty winds across southwestern
Wyoming this afternoon.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Minor flooding continues possible due to snowmelt and additional
rain and snowfall through Thursday along creeks, streams, and
low-lying areas across western and southwest Wyoming below 7500
feet.

Additionally...a new storm system will impact much of the area
with mountain snowfall and a cold rain possibly changing to snow
across parts of the lower elevations of Central Wyoming. Isolated
thunderstorms may also occur. Significant mountain snowfall could
occur across portions of the central and northern mountains.

Saturday and Sunday...The next Pacific storm system will spread
precipitation into the west on Saturday in the form of mountain
snow showers and a mix of rain and snow showers in the valleys. Mountain
passes will likely become slick with snowfall Saturday across the
west. A cold front will plunge south across central Wyoming
Saturday night with areas of light snow possible, mainly along
Interstate 25 from Buffalo to Casper early Sunday morning.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to report flooding or other significant
weather. Thank you!

$$

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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