Wind Chill Warning 1, NWS Cheyenne, WY

178 
WWUS45 KCYS 212031
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
131 PM MST Mon Feb 21 2022

WYZ112-114-221200-
/O.CON.KCYS.WS.W.0003.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
131 PM MST Mon Feb 21 2022

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

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 11 AM TUESDAY TO
11 AM MST THURSDAY...

* WHAT...Heavy mountain snow and some blowing snow likely, along
  with a prolonged period of dangerous wind chills. Total snow
  accumulations of 12 to 20 inches. Winds gusting as high as 50 
  MPH. Wind chills as low as 30 degrees below zero.

* WHERE...Snowy and Sierra Madre mountain ranges, mainly above 
  9000 feet elevation.

* WHEN...Winter Storm Warning until 11 AM MST Tuesday. Wind 
  Chill Advisory from 11 AM MST Tuesday until 11 AM MST Thursday.

* IMPACTS...Mountain travel will be extremely dangerous or 
  impossible due to icy, snow packed roads and very low 
  visibilities in falling and blowing snow. Outdoor recreation 
  could be life threatening to those caught unprepared for 
  severe winter conditions. Dangerously low wind chills could 
  lead to frostbite on exposed skin in as little as 10 minutes. 
  Hypothermia can develop quickly if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ104-105-109>111-113-221200-
/O.CON.KCYS.WS.W.0003.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Upper North Platte River Basin-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Rawlins, Arlington, Elk Mountain, Baggs, Saratoga, and Encampment
131 PM MST Mon Feb 21 2022

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

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 11 AM TUESDAY TO
11 AM MST THURSDAY...

* WHAT...Heavy snow and some blowing snow likely, along with a
  prolonged period of dangerously low wind chills. Total snow
  accumulations of 6 to 12 inches. Winds gusting as high as 40
  MPH. Wind chills as low as 30 degrees below zero.

* WHERE...Lower elevations of Carbon County including Baggs, 
  Rawlins, Muddy Gap, Shirley Basin, Saratoga, and Elk Mountain.

* WHEN...Winter Storm Warning until 11 AM MST Tuesday. Wind 
  Chill Advisory from 11 AM MST Tuesday until 11 AM MST Thursday.

* IMPACTS...Travel will be extremely dangerous or impossible due 
  to icy, snow packed roads and very low visibilities in falling 
  and blowing snow. Dangerously low wind chills could lead to 
  frostbite on exposed skin in as little as 10 minutes. 
  Hypothermia can develop quickly if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

NEZ002-095-WYZ101-102-221200-
/O.CON.KCYS.WC.W.0001.220222T0000Z-220224T1800Z/
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
Dawes County-Northern Sioux County-
Converse County Lower Elevations-Niobrara County-
Including the cities of Chadron, Chadron St Park, Harrison, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, and Redbird
131 PM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
TUESDAY...

...WIND CHILL WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 11 AM MST THURSDAY...

* WHAT...Periods of snow, along with a prolonged period of
  extremely dangerous wind chills. Total snow accumulations of 3
  to 6 inches. Wind chills as low as 40 degrees below zero 
  likely.

* WHERE...East central Wyoming into the northern Nebraska 
  Panhandle including Douglas, Lusk, Harrison, and Chadron.

* WHEN...Winter Weather Advisory in effect until 11 AM MST 
  Tuesday. Wind Chill Warning in effect from 5 PM MST this evening
  until 11 AM MST Thursday February 24th.

* IMPACTS...Hazardous travel conditions due to icy, snow covered 
  roads and reduced visibilities in falling and blowing snow. 
  Dangerously low wind chills could lead to frostbite on exposed 
  skin in 5 minutes or less. Hypothermia can develop quickly if 
  precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. Slow down and use 
caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

NEZ003-021-096-221200-
/O.CON.KCYS.WC.W.0001.220222T0000Z-220224T1800Z/
Box Butte County-Morrill County-Southern Sioux County-
Including the cities of Alliance, Hemingford, Angora, Bridgeport,
Bayard, Redington, and Agate
131 PM MST Mon Feb 21 2022

...WIND CHILL WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 11 AM MST THURSDAY...

* WHAT...Extremely dangerous wind chills likely, along with some 
  light snowfall. Total snow accumulations up to 2 inches 
  possible. Wind chills as low as 40 degrees below zero likely.

* WHERE...Morrill, Box Butte, and southern Sioux Counties in the 
  Nebraska Panhandle including Bridgeport, Alliance, Hemingford, 
  and Agate.

* WHEN...5 PM MST this evening through 11 AM MST Thursday 
  February 24th. Best chance for accumulating snowfall today 
  through early Tuesday.

* IMPACTS...Dangerously cold wind chills could lead to frostbite 
  on exposed skin in 5 minutes or less. Hypothermia can develop 
  quickly if precautions are not taken. In addition, some 
  roadways may become slick or snow covered where heavier snow 
  falls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

WYZ115-116-221200-
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
Laramie Valley-South Laramie Range-
Including the cities of Laramie, Bosler, Buford, Pumpkin Vine, 
and Vedauwoo
131 PM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
TUESDAY...

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 11 AM TUESDAY TO
11 AM MST THURSDAY...

* WHAT...Snow and some blowing snow expected, along with a 
  prolonged period of dangerous wind chills. Total snow 
  accumulations up to 3 inches possible. Wind chills as low as 
  30 degrees below zero.

* WHERE...Laramie Valley and the southern Laramie Range 
  including Vedauwoo, the Interstate 80 Summit, and the city of 
  Laramie.

* WHEN...Winter Weather Advisory until 11 AM MST Tuesday. Wind 
  Chill Advisory from 11 AM MST Tuesday until 11 AM MST Thursday.

* IMPACTS...Hazardous travel conditions due to icy, snow covered 
  roads and reduced visibilities in falling and blowing snow. 
  Dangerously low wind chills could lead to frostbite on exposed 
  skin in less than 10 minutes. Hypothermia can develop quickly 
  if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ103-106>108-221200-
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-
Including the cities of Garrett, Esterbrook, Bordeaux, Wheatland,
Guernsey, and Torrington
131 PM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
TUESDAY...

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 11 AM TUESDAY TO
11 AM MST THURSDAY...

* WHAT...Snow and some blowing snow expected, along with a
  prolonged period of dangerous wind chills. Total snow
  accumulations of 3 to 6 inches for lower elevations with 6 to 12
  inches in the Laramie Range mountains. Winds gusting up to 35 
  MPH. Wind chills as low as 30 degrees below zero.

* WHERE...Northern and central Laramie Range and adjacent lower 
  elevations of eastern Platte County including Esterbrook, 
  Bordeaux, and Wheatland.

* WHEN...Winter Weather Advisory until 11 AM MST Tuesday. Wind 
  Chill Advisory from 11 AM MST Tuesday until 11 AM MST Thursday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute. The 
  dangerously cold wind chills could cause frostbite on exposed 
  skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Wear appropriate 
clothing, a hat, and gloves. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

NEZ019-020-054-055-WYZ117>119-221200-
/O.CON.KCYS.WC.Y.0006.220222T0000Z-220224T1800Z/
Scotts Bluff County-Banner County-Kimball County-Cheyenne County-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
Including the cities of Scottsbluff, Gering, Harrisburg, Kimball,
Sidney, Brownson, Whitaker, Federal, Horse Creek, Cheyenne, 
and Pine Bluffs
131 PM MST Mon Feb 21 2022

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 11 AM MST THURSDAY...

* WHAT...Dangerous wind chills expected, along with periods of 
  light snowfall. Total snow accumulations of 1 to 2 inches. Wind 
  chills as low as 30 degrees below zero.

* WHERE...Far southeast Wyoming into the southern Nebraska 
  Panhandle including Cheyenne, Pine Bluffs, Scottsbluff, 
  Kimball, and Sidney.

* WHEN...5 PM MST this evening through 11 AM MST Thursday 
  February 24th. Best chance for accumulating snowfall tonight 
  through early Tuesday.

* IMPACTS...Dangerously cold wind chills could lead to frostbite 
  on exposed skin in less than 10 minutes. Hypothermia can 
  develop quickly if precautions are not taken. In addition, 
  some roadways may become slick or snow covered where heavier 
  snow falls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

&&

$$
tt

118 
WWUS45 KCYS 220449
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
949 PM MST Mon Feb 21 2022

NEZ055-221700-
/O.UPG.KCYS.WC.Y.0006.000000T0000Z-220224T1800Z/
/O.EXA.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Cheyenne County-
Including the cities of Sidney and Brownson
949 PM MST Mon Feb 21 2022

...WIND CHILL WARNING IN EFFECT UNTIL 11 AM MST THURSDAY...

* WHAT...Dangerous wind chills expected, along with periods of
  light snowfall. Wind chills as low as 30 degrees below zero. 

* WHERE...Southern Nebraska Panhandle, including the cites of
  Sidney and Brownson.

* WHEN...5 PM MST this evening through 11 AM MST Thursday February
  24th.  

* IMPACTS...Dangerously cold wind chills could lead to frostbite 
  on exposed skin in less than 10 minutes. Hypothermia can 
  develop quickly if precautions are not taken. In addition, 
  some roadways may become slick or snow covered where heavier 
  snow falls. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

A Wind Chill Warning means the combination of very cold air and
strong winds will create dangerously low wind chill values. This
will result in frost bite and lead to hypothermia or death if
precautions are not taken.

&&

$$

WYZ112-114-221700-
/O.CON.KCYS.WS.W.0003.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
949 PM MST Mon Feb 21 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
TUESDAY...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 11 AM TUESDAY TO
11 AM MST THURSDAY...

* WHAT...Heavy mountain snow and some blowing snow likely, along 
  with a prolonged period of dangerous wind chills. Total snow 
  accumulations of 12 to 20 inches. Winds gusting as high as 50 
  MPH. Wind chills as low as 30 degrees below zero. 

* WHERE...Snowy and Sierra Madre mountain ranges, mainly above 
  9000 feet elevation. 

* WHEN...Winter Storm Warning until 11 AM MST Tuesday. Wind 
  Chill Advisory from 11 AM MST Tuesday until 11 AM MST 
  Thursday. 

* IMPACTS...Mountain travel will be extremely dangerous or 
  impossible due to icy, snow packed roads and very low 
  visibilities in falling and blowing snow. Outdoor recreation 
  could be life threatening to those caught unprepared for 
  severe winter conditions. Dangerously low wind chills could 
  lead to frostbite on exposed skin in as little as 10 minutes. 
  Hypothermia can develop quickly if precautions are not taken. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ104-105-109>111-113-221700-
/O.CON.KCYS.WS.W.0003.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Upper North Platte River Basin-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Rawlins, Arlington, Elk Mountain, Baggs, Saratoga, and Encampment
949 PM MST Mon Feb 21 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
TUESDAY...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 11 AM TUESDAY TO
11 AM MST THURSDAY...

* WHAT...Heavy snow and some blowing snow likely, along with a 
  prolonged period of dangerously low wind chills. Total snow 
  accumulations of 6 to 12 inches. Winds gusting as high as 40 
  MPH. Wind chills as low as 30 degrees below zero. 

* WHERE...Lower elevations of Carbon County including Baggs, 
  Rawlins, Muddy Gap, Shirley Basin, Saratoga, and Elk Mountain. 

* WHEN...Winter Storm Warning until 11 AM MST Tuesday. Wind 
  Chill Advisory from 11 AM MST Tuesday until 11 AM MST 
  Thursday. 

* IMPACTS...Travel will be extremely dangerous or impossible due 
  to icy, snow packed roads and very low visibilities in falling 
  and blowing snow. Dangerously low wind chills could lead to 
  frostbite on exposed skin in as little as 10 minutes. 
  Hypothermia can develop quickly if precautions are not taken. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

NEZ002-095-WYZ101-102-221700-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
Dawes County-Northern Sioux County-
Converse County Lower Elevations-Niobrara County-
Including the cities of Chadron, Chadron St Park, Harrison, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, and Redbird
949 PM MST Mon Feb 21 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
TUESDAY...

* WHAT...Periods of snow, along with a prolonged period of 
  extremely dangerous wind chills. Total snow accumulations of 3 
  to 6 inches. Wind chills as low as 40 degrees below zero 
  likely. 

* WHERE...East central Wyoming into the northern Nebraska 
  Panhandle including Douglas, Lusk, Harrison, and Chadron. 

* WHEN...Winter Weather Advisory in effect until 11 AM MST 
  Tuesday. Wind Chill Warning in effect from 5 PM MST this 
  evening until 11 AM MST Thursday February 24th. 

* IMPACTS...Hazardous travel conditions due to icy, snow covered 
  roads and reduced visibilities in falling and blowing snow. 
  Dangerously low wind chills could lead to frostbite on exposed 
  skin in 5 minutes or less. Hypothermia can develop quickly if 
  precautions are not taken. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. Slow down and use
caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

NEZ003-021-096-221700-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Box Butte County-Morrill County-Southern Sioux County-
Including the cities of Alliance, Hemingford, Angora, Bridgeport,
Bayard, Redington, and Agate
949 PM MST Mon Feb 21 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...

* WHAT...Extremely dangerous wind chills likely, along with some 
  light snowfall. Total snow accumulations up to 2 inches 
  possible. Wind chills as low as 40 degrees below zero likely. 

* WHERE...Morrill, Box Butte, and southern Sioux Counties in the 
  Nebraska Panhandle including Bridgeport, Alliance, Hemingford, 
  and Agate. 

* WHEN...5 PM MST this evening through 11 AM MST Thursday 
  February 24th. Best chance for accumulating snowfall today 
  through early Tuesday. 

* IMPACTS...Dangerously cold wind chills could lead to frostbite 
  on exposed skin in 5 minutes or less. Hypothermia can develop 
  quickly if precautions are not taken. In addition, some 
  roadways may become slick or snow covered where heavier snow 
  falls. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves.

&&

$$

WYZ115-116-221700-
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
Laramie Valley-South Laramie Range-
Including the cities of Laramie, Bosler, Buford, Pumpkin Vine, 
and Vedauwoo
949 PM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
TUESDAY...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 11 AM TUESDAY TO
11 AM MST THURSDAY...

* WHAT...Snow and some blowing snow expected, along with a 
  prolonged period of dangerous wind chills. Total snow 
  accumulations up to 3 inches possible. Wind chills as low as 
  30 degrees below zero. 

* WHERE...Laramie Valley and the southern Laramie Range 
  including Vedauwoo, the Interstate 80 Summit, and the city of 
  Laramie. 

* WHEN...Winter Weather Advisory until 11 AM MST Tuesday. Wind 
  Chill Advisory from 11 AM MST Tuesday until 11 AM MST 
  Thursday. 

* IMPACTS...Hazardous travel conditions due to icy, snow covered 
  roads and reduced visibilities in falling and blowing snow. 
  Dangerously low wind chills could lead to frostbite on exposed 
  skin in less than 10 minutes. Hypothermia can develop quickly 
  if precautions are not taken. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ103-106>108-221700-
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-
Including the cities of Garrett, Esterbrook, Bordeaux, Wheatland,
Guernsey, and Torrington
949 PM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
TUESDAY...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 11 AM TUESDAY TO
11 AM MST THURSDAY...

* WHAT...Snow and some blowing snow expected, along with a 
  prolonged period of dangerous wind chills. Total snow 
  accumulations of 3 to 6 inches for lower elevations with 6 to 
  12 inches in the Laramie Range mountains. Winds gusting up to 
  35 MPH. Wind chills as low as 30 degrees below zero. 

* WHERE...Northern and central Laramie Range and adjacent lower 
  elevations of eastern Platte County including Esterbrook, 
  Bordeaux, and Wheatland. 

* WHEN...Winter Weather Advisory until 11 AM MST Tuesday. Wind 
  Chill Advisory from 11 AM MST Tuesday until 11 AM MST 
  Thursday. 

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute. The 
  dangerously cold wind chills could cause frostbite on exposed 
  skin in as little as 10 minutes. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Wear appropriate
clothing, a hat, and gloves.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

NEZ019-020-054-WYZ117>119-221700-
/O.CON.KCYS.WC.Y.0006.000000T0000Z-220224T1800Z/
Scotts Bluff County-Banner County-Kimball County-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
Including the cities of Scottsbluff, Gering, Harrisburg, Kimball,
Whitaker, Federal, Horse Creek, Cheyenne, and Pine Bluffs
949 PM MST Mon Feb 21 2022

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...

* WHAT...Dangerous wind chills expected, along with periods of 
  light snowfall. Total snow accumulations of 1 to 2 inches. 
  Wind chills as low as 30 degrees below zero. 

* WHERE...Far southeast Wyoming into the southern Nebraska 
  Panhandle including Cheyenne, Pine Bluffs, Scottsbluff, 
  Kimball, and Sidney. 

* WHEN...5 PM MST this evening through 11 AM MST Thursday 
  February 24th. Best chance for accumulating snowfall tonight 
  through early Tuesday. 

* IMPACTS...Dangerously cold wind chills could lead to frostbite 
  on exposed skin in less than 10 minutes. Hypothermia can 
  develop quickly if precautions are not taken. In addition, 
  some roadways may become slick or snow covered where heavier 
  snow falls. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

&&

$$

880 
WWUS45 KCYS 221014
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
314 AM MST Tue Feb 22 2022

WYZ112-114-230000-
/O.UPG.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
/O.EXB.KCYS.WC.W.0001.220223T0000Z-220224T1800Z/
/O.CON.KCYS.WS.W.0003.000000T0000Z-220222T1800Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
314 AM MST Tue Feb 22 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM
MST THURSDAY...

* WHAT...Snow ending, with a continued period of extremely
  dangerous wind chills. Additional accumulations of 2 to 4 inches
  possible. Wind chills as low as 35 degrees below zero. 

* WHERE...Snowy and Sierra Madre Mountain Ranges.

* WHEN...Winter Storm Warning ends at 11 AM MST this morning. Wind
  Chill Warning from 5 PM MST today until 11 AM MST Thursday.

* IMPACTS...Mountain travel will be dangerous or impossible due to
  icy, snow packed roads and reduced visibilities in falling and
  blowing snow. Outdoor recreation could be life threatening to
  those caught unprepared for severe winter conditions. Extremely
  dangerous wind chills could lead to frostbite on exposed skin in
  5 minutes or less. Hypothermia can develop quickly if
  precautions are not taken. 

* ADDITIONAL DETAILS...Another round of light snow is possible
  late Tuesday night through Wednesday. Additional accumulations
  of 1 to 3 inches will be possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ104-105-109>111-113-230000-
/O.UPG.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
/O.EXB.KCYS.WC.W.0001.220223T0000Z-220224T1800Z/
/O.CON.KCYS.WS.W.0003.000000T0000Z-220222T1800Z/
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Upper North Platte River Basin-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Rawlins, Arlington, Elk Mountain, Baggs, Saratoga, and Encampment
314 AM MST Tue Feb 22 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM
MST THURSDAY...

* WHAT...Snow ending, with a continued period of extremely
  dangerous wind chills. Additional accumulations generally less
  than one inch. Wind chills as low as 35 degrees below zero. 

* WHERE...Lower elevations of Carbon County including Baggs,
  Rawlins, Muddy Gap, Shirley Basin, Saratoga, and Elk Mountain. 

* WHEN...Winter Storm Warning ends at 11 AM MST this morning. Wind
  Chill Warning from 5 PM MST today until 11 AM MST Thursday.

* IMPACTS...Travel will be dangerous due to icy, snow packed roads
  and reduced visibilities in falling and blowing snow. Extremely
  dangerous wind chills could lead to frostbite on exposed skin 
  in 5 minutes or less. Hypothermia can develop quickly if 
  precautions are not taken. 

* ADDITIONAL DETAILS...Another round of light snow is possible
  late Tuesday night through Wednesday. Additional accumulations
  of 1 to 3 inches will be possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ115-116-230000-
/O.UPG.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
/O.EXA.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
Laramie Valley-South Laramie Range-
Including the cities of Laramie, Bosler, Buford, Pumpkin Vine, 
and Vedauwoo
314 AM MST Tue Feb 22 2022

...WIND CHILL WARNING IN EFFECT UNTIL 11 AM MST THURSDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow ending, with a continued period of extremely
  dangerous wind chills. Additional accumulations generally less
  than one inch. Wind chills as low as 35 degrees below zero. 

* WHERE...Laramie Valley and South Laramie Range. 

* WHEN...Winter Weather Advisory ends at 11 AM MST this morning.
  Wind Chill Warning in effect until 11 AM MST Thursday.

* IMPACTS...Hazardous travel conditions due to slick roadways and
  reduced visibilities in falling and blowing snow. Dangerously
  low wind chills could lead to frostbite on exposed skin in 5
  minutes or less. Hypothermia can develop quickly if precautions
  are not taken.

* ADDITIONAL DETAILS...Another round of light snow is possible
  late Tuesday night through Wednesday. Additional accumulations
  of 1 to 3 inches will be possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens. 

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

WYZ103-106>108-230000-
/O.UPG.KCYS.WC.Y.0006.220222T1800Z-220224T1800Z/
/O.EXA.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-
Including the cities of Garrett, Esterbrook, Bordeaux, Wheatland,
Guernsey, and Torrington
314 AM MST Tue Feb 22 2022

...WIND CHILL WARNING IN EFFECT UNTIL 11 AM MST THURSDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow ending, with a continued period of extremely
  dangerous wind chills. Additional accumulations generally less
  than one inch. Wind chills as low as 35 degrees below zero. 

* WHERE...Northern and central Laramie Range and adjacent high
  plains including Wheatland and Torrington. 

* WHEN...Winter Weather Advisory ends at 11 AM MST this morning.
  Wind Chill Warning in effect until 11 AM MST Thursday.

* IMPACTS...Hazardous travel conditions due to slick roadways and
  reduced visibilities in falling and blowing snow. Dangerously
  low wind chills could lead to frostbite on exposed skin in 5
  minutes or less. Hypothermia can develop quickly if precautions
  are not taken.

* ADDITIONAL DETAILS...Another round of light snow is possible
  late Tuesday night through Wednesday. Additional accumulations
  of 1 to 3 inches will be possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens. 

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

NEZ019-020-054-WYZ117>119-230000-
/O.UPG.KCYS.WC.Y.0006.000000T0000Z-220224T1800Z/
/O.EXA.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Scotts Bluff County-Banner County-Kimball County-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
Including the cities of Scottsbluff, Gering, Harrisburg, Kimball,
Whitaker, Federal, Horse Creek, Cheyenne, and Pine Bluffs
314 AM MST Tue Feb 22 2022

...WIND CHILL WARNING IN EFFECT UNTIL 11 AM MST THURSDAY...

* WHAT...Extremely dangerous wind chills as low as 35 degrees
  below zero. 

* WHERE...Much of southeast Wyoming and the western Nebraska
  Panhandle. 

* WHEN...Until 11 AM MST Thursday.

* IMPACTS...Dangerously cold wind chills could lead to frostbite
  on exposed skin in 5 minutes or less. Hypothermia can develop
  quickly if precautions are not taken. In addition, some roadways
  may be slick or snow covered do to snow showers in the area.

* ADDITIONAL DETAILS...Another round of light snow is possible
  late Tuesday night through Wednesday. Additional accumulations
  of 1 to 3 inches will be possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens. 

&&

$$

NEZ002-095-WYZ101-102-230000-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
/O.CON.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
Dawes County-Northern Sioux County-
Converse County Lower Elevations-Niobrara County-
Including the cities of Chadron, Chadron St Park, Harrison, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, and Redbird
314 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow ending, with a continued period of extremely
  dangerous wind chills. Additional accumulations generally less
  than one inch. Wind chills as low as 40 degrees below zero. 

* WHERE...East central Wyoming into the northern Nebraska 
  Panhandle including Douglas, Lusk, Harrison, and Chadron.

* WHEN...Winter Weather Advisory ends at 11 AM MST this morning.
  Wind Chill Warning in effect until 11 AM MST Thursday.

* IMPACTS...Hazardous travel conditions due to slick roadways and
  reduced visibilities in falling and blowing snow. Dangerously
  low wind chills could lead to frostbite on exposed skin in 5
  minutes or less. Hypothermia can develop quickly if precautions
  are not taken.

* ADDITIONAL DETAILS...Another round of light snow is possible
  late Tuesday night through Wednesday. Additional accumulations
  of 1 to 3 inches will be possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens. 

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

NEZ003-021-055-096-230000-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Box Butte County-Morrill County-Cheyenne County-
Southern Sioux County-
Including the cities of Alliance, Hemingford, Angora, Bridgeport,
Bayard, Redington, Sidney, Brownson, and Agate
314 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...

* WHAT...Snow ending, with a continued period of extremely
  dangerous wind chills. Additional accumulations generally less
  than one inch. Wind chills as low as 40 degrees below zero. 

* WHERE...Morrill, Box Butte, and southern Sioux Counties in the 
  Nebraska Panhandle including Bridgeport, Alliance, Hemingford, 
  and Agate.

* WHEN...Until 11 AM MST Thursday.

* IMPACTS...Dangerously cold wind chills could lead to frostbite
  on exposed skin in 5 minutes or less. Hypothermia can develop
  quickly if precautions are not taken. In addition, some roadways
  may be slick or snow covered do to snow showers in the area.

* ADDITIONAL DETAILS...Another round of light snow is possible
  late Tuesday night through Wednesday. Additional accumulations
  of 1 to 3 inches will be possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens. 

&&

$$

CLH

536 
WWUS45 KCYS 221743
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
Issued by National Weather Service Riverton WY
1043 AM MST Tue Feb 22 2022

WYZ112-114-231300-
/O.EXP.KCYS.WS.W.0003.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.W.0001.220223T0000Z-220224T1800Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
1043 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 11 AM MST THURSDAY...
...WINTER STORM WARNING WILL EXPIRE AT 11 AM MST THIS MORNING...

* WHAT...Dangerously cold wind chills expected. Wind chills as 
  low as 35 below zero.

* WHERE...Snowy and Sierra Madre Mountain Ranges.

* WHEN...Winter Storm Warning ends at 11 AM MST this morning. 
  Wind Chill Warning from 5 PM MST today until 11 AM MST 
  Thursday.

* IMPACTS...The dangerously cold wind chills could cause frostbite
  on exposed skin in as little as 10 minutes.

* ADDITIONAL DETAILS...Another round of light snow is possible 
  late Tuesday night through Wednesday. Additional accumulations 
  of 1 to 3 inches will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

WYZ104-105-109>111-113-231300-
/O.EXP.KCYS.WS.W.0003.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.W.0001.220223T0000Z-220224T1800Z/
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Upper North Platte River Basin-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Rawlins, Arlington, Elk Mountain, Baggs, Saratoga, and Encampment
1043 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 11 AM MST THURSDAY...
...WINTER STORM WARNING WILL EXPIRE AT 11 AM MST THIS MORNING...

* WHAT...Dangerously cold wind chills expected. Wind chills as 
  low as 35 below zero.

* WHERE...Lower elevations of Carbon County including Baggs, 
  Rawlins, Muddy Gap, Shirley Basin, Saratoga, and Elk Mountain.

* WHEN...Winter Storm Warning ends at 11 AM MST this morning. 
  Wind Chill Warning from 5 PM MST today until 11 AM MST 
  Thursday.

* IMPACTS...The dangerously cold wind chills could cause frostbite
  on exposed skin in as little as 10 minutes.

* ADDITIONAL DETAILS...Another round of light snow is possible 
  late Tuesday night through Wednesday. Additional accumulations 
  of 1 to 3 inches will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

WYZ115-116-231300-
/O.EXP.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Laramie Valley-South Laramie Range-
Including the cities of Laramie, Bosler, Buford, Pumpkin Vine, 
and Vedauwoo
1043 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS
MORNING...

* WHAT...Dangerously cold wind chills. Wind chills as low as 35 
  below zero.

* WHERE...Laramie Valley and South Laramie Range.

* WHEN...Winter Weather Advisory ends at 11 AM MST this morning. 
  Wind Chill Warning in effect until 11 AM MST Thursday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

* ADDITIONAL DETAILS...Another round of light snow is possible 
  late Tuesday night through Wednesday. Additional accumulations 
  of 1 to 3 inches will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

NEZ002-095-WYZ101>103-106>108-231300-
/O.EXP.KCYS.WW.Y.0010.000000T0000Z-220222T1800Z/
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Dawes County-Northern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-
Including the cities of Chadron, Chadron St Park, Harrison, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, Redbird, Garrett, 
Esterbrook, Bordeaux, Wheatland, Guernsey, and Torrington
1043 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS
MORNING...

* WHAT...Dangerously cold wind chills. Wind chills as low as 40 
  below zero.

* WHERE...East central Wyoming into the northern Nebraska 
  Panhandle including Douglas, Lusk, Harrison, and Chadron.

* WHEN...Winter Weather Advisory ends at 11 AM MST this morning. 
  Wind Chill Warning in effect until 11 AM MST Thursday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

* ADDITIONAL DETAILS...Another round of light snow is possible 
  late Tuesday night through Wednesday. Additional accumulations 
  of 1 to 3 inches will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

NEZ003-019>021-054-055-096-WYZ117>119-231300-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Box Butte County-Scotts Bluff County-Banner County-Morrill County-
Kimball County-Cheyenne County-Southern Sioux County-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
Including the cities of Alliance, Hemingford, Scottsbluff, 
Gering, Harrisburg, Angora, Bridgeport, Bayard, Redington, 
Kimball, Sidney, Brownson, Agate, Whitaker, Federal, Horse Creek,
Cheyenne, and Pine Bluffs
1043 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...

* WHAT...Snow ending, with a continued period of extremely 
  dangerous wind chills. Additional accumulations generally less 
  than one inch. Wind chills as low as 40 degrees below zero.

* WHERE...Morrill, Box Butte, and southern Sioux Counties in the 
  Nebraska Panhandle including Bridgeport, Alliance, Hemingford, 
  and Agate.

* WHEN...Until 11 AM MST Thursday.

* IMPACTS...Dangerously cold wind chills could lead to frostbite
  on exposed skin in 5 minutes or less. Hypothermia can develop
  quickly if precautions are not taken. 

* ADDITIONAL DETAILS...Another round of light snow is possible 
  late Tuesday night through Wednesday. Additional accumulations 
  of 1 to 3 inches will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens.

&&

$$

154 
WWUS45 KCYS 222210
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
310 PM MST Tue Feb 22 2022

NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-115>119-
231200-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Laramie Valley-
South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
Including the cities of Chadron, Chadron St Park, Alliance, 
Hemingford, Scottsbluff, Gering, Harrisburg, Angora, Bridgeport, 
Bayard, Redington, Kimball, Sidney, Brownson, Harrison, Agate, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, Redbird, Garrett, 
Esterbrook, Bordeaux, Wheatland, Guernsey, Torrington, Laramie, 
Bosler, Buford, Pumpkin Vine, Vedauwoo, Whitaker, Federal, 
Horse Creek, Cheyenne, and Pine Bluffs
310 PM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...

* WHAT...Dangerously cold wind chills. Wind chills as low as 40 
  below zero.

* WHERE...East central Wyoming into the northern Nebraska 
  Panhandle including Douglas, Lusk, Harrison, and Chadron.

* WHEN...Wind Chill Warning in effect until 11 AM MST Thursday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

WYZ104-105-109>114-231200-
/O.CON.KCYS.WC.W.0001.220223T0000Z-220224T1800Z/
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-
Including the cities of Seminoe Dam, Medicine Bow, Shirley Basin,
Rawlins, Arlington, Elk Mountain, Baggs, Saratoga, Encampment, 
Centennial, and Albany
310 PM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...

* WHAT...Dangerously cold wind chills expected. Wind chills as 
  low as 35 below zero.

* WHERE...Lower elevations of Carbon County including Baggs, 
  Rawlins, Muddy Gap, Shirley Basin, Saratoga, and Elk Mountain.

* WHEN...Wind Chill Warning from 5 PM MST today until 11 AM MST 
  Thursday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

561 
WWUS45 KCYS 230956
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
256 AM MST Wed Feb 23 2022

NEZ002-003-019>021-054-055-095-096-WYZ101>119-240000-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
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-
Including the cities of Chadron, Chadron St Park, Alliance, 
Hemingford, Scottsbluff, Gering, Harrisburg, Angora, Bridgeport, 
Bayard, Redington, Kimball, Sidney, Brownson, Harrison, Agate, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, Redbird, Garrett, 
Esterbrook, Seminoe Dam, Medicine Bow, Shirley Basin, Bordeaux, 
Wheatland, Guernsey, Torrington, Rawlins, Arlington, 
Elk Mountain, Baggs, Saratoga, Encampment, Centennial, Albany, 
Laramie, Bosler, Buford, Pumpkin Vine, Vedauwoo, Whitaker, 
Federal, Horse Creek, Cheyenne, and Pine Bluffs
256 AM MST Wed Feb 23 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST
THURSDAY...

* WHAT...Dangerously cold wind chills. Widespread wind chills 25
  to 40 degrees below zero. 

* WHERE...All of southeast Wyoming and the western Nebraska
  Panhandle. 

* WHEN...Until 11 AM MST Thursday.

* IMPACTS...Extremely dangerous wind chills may cause frostbite 
  in as little as 5 minutes. Hypothermia can also set in quickly 
  if precautions are not taken. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens. 

&&

$$

CLH

530 
WWUS45 KCYS 232015
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
115 PM MST Wed Feb 23 2022

NEZ002-003-019>021-054-055-095-096-WYZ101>119-241200-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
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-
Including the cities of Chadron, Chadron St Park, Alliance, 
Hemingford, Scottsbluff, Gering, Harrisburg, Angora, Bridgeport, 
Bayard, Redington, Kimball, Sidney, Brownson, Harrison, Agate, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, Redbird, Garrett, 
Esterbrook, Seminoe Dam, Medicine Bow, Shirley Basin, Bordeaux, 
Wheatland, Guernsey, Torrington, Rawlins, Arlington, 
Elk Mountain, Baggs, Saratoga, Encampment, Centennial, Albany, 
Laramie, Bosler, Buford, Pumpkin Vine, Vedauwoo, Whitaker, 
Federal, Horse Creek, Cheyenne, and Pine Bluffs
115 PM MST Wed Feb 23 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY...

* WHAT...Dangerously cold wind chills. Widespread wind chills 25 
  to 40 degrees below zero.

* WHERE...Southeast Wyoming and the Western Nebraska Panhandle.

* WHEN...Until 11 AM MST Thursday.

* IMPACTS...Dangerous wind chills may cause frostbite in as 
  little as 5 minutes. Hypothermia can also set in quickly if 
  precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, knit hat, and mittens.

&&

$$

492 
WWUS45 KCYS 240913
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
213 AM MST Thu Feb 24 2022

NEZ002-003-019>021-054-055-095-096-WYZ101>119-241800-
/O.CON.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
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-
Including the cities of Chadron, Chadron St Park, Alliance, 
Hemingford, Scottsbluff, Gering, Harrisburg, Angora, Bridgeport, 
Bayard, Redington, Kimball, Sidney, Brownson, Harrison, Agate, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, Redbird, Garrett, 
Esterbrook, Seminoe Dam, Medicine Bow, Shirley Basin, Bordeaux, 
Wheatland, Guernsey, Torrington, Rawlins, Arlington, 
Elk Mountain, Baggs, Saratoga, Encampment, Centennial, Albany, 
Laramie, Bosler, Buford, Pumpkin Vine, Vedauwoo, Whitaker, 
Federal, Horse Creek, Cheyenne, and Pine Bluffs
213 AM MST Thu Feb 24 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Dangerously cold wind chills. Wind chills as low as 30 to
  40 below zero.

* WHERE...Southeast Wyoming and the Western Nebraska Panhandle.

* WHEN...Until 11 AM MST this morning.

* IMPACTS...The cold wind chills could cause frostbite on exposed
  skin in as little as 15 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

BMW

170 
WWUS45 KCYS 241610
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
910 AM MST Thu Feb 24 2022

NEZ002-003-019>021-054-055-095-096-WYZ101>119-241715-
/O.CAN.KCYS.WC.W.0001.000000T0000Z-220224T1800Z/
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
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-
Including the cities of Chadron, Chadron St Park, Alliance, 
Hemingford, Scottsbluff, Gering, Harrisburg, Angora, Bridgeport, 
Bayard, Redington, Kimball, Sidney, Brownson, Harrison, Agate, 
Douglas, Glenrock, Bill, Deer Creek, Lusk, Redbird, Garrett, 
Esterbrook, Seminoe Dam, Medicine Bow, Shirley Basin, Bordeaux, 
Wheatland, Guernsey, Torrington, Rawlins, Arlington, 
Elk Mountain, Baggs, Saratoga, Encampment, Centennial, Albany, 
Laramie, Bosler, Buford, Pumpkin Vine, Vedauwoo, Whitaker, 
Federal, Horse Creek, Cheyenne, and Pine Bluffs
910 AM MST Thu Feb 24 2022

...WIND CHILL WARNING IS CANCELLED...

Surface temperatures will slowly moderate into the teens this
afternoon. Wind speeds will be lighter. As a result, wind chill
temperatures will moderate into the single digits above and below
zero this afternoon. Therefore, the Wind Chill Warning is 
cancelled.

$$

Area Forecast Discussion
National Weather Service Cheyenne WY
1031 PM MST Sun Feb 20 2022

.UPDATE...
observation site in Chadron has switched to a north wind around 720
PM MST. Comparing this arrival time to some HI-RES models
(HRRR/NAM/ARW) the arctic front running ahead of schedule compared
to all HI-RES outputs. The HRRR is doing the best being only 30-40
minutes behind. The temperature has dropped in Chadron but the bulk
of the cA (continental Arctic) airmass is lagging and is still
moving across southwestern South Dakota. This airmass will continue
push toward the NE Panhandle and overtime it will catch up to the
main frontal boundary by the early morning hours. We will continue
to track this front as it pushes across the NE Panhandle and some
slight tweaks in the hourly temperatures may be needed.

.SHORT TERM...(This evening through Tuesday)
Issued at 330 PM MST Sun Feb 20 2022

Very pleasant weather this afternoon, even with breezy to locally
windy conditions at times and some high clouds moving across the
region. Temperatures have climbed into the middle 50s to low 60s
across most of the eastern plains along and east of the Interstate
25 corridor. Temperatures should max out in the upper 50s to
middle 60s before the sun begins to set.  Still need to monitor
the northern Snowy Range foothills, including Arlington and Elk
Mountain, for strong gusty winds. After a bit of a lull late this
morning, winds have increased once again closer to Elk Mountain
with gusts of 55 to 57 mph detected. Will handle this with a SPS
for now, but if gusts start climbing towards 65 mph...will likely
need a short fused High Wind Warning ahead of the arctic front.
Otherwise, you have one more relatively mild evening to enjoy
before the arctic blast plunges south tonight. Leading edge of the
arctic front is just starting to push into far northern Wyoming
near the Montana border, with winds shifting into the northeast
and afternoon temperatures beginning to fall into the 30s at this
time. If you go a few hundred miles northeast, temperatures have
lowered into the single digits and teens in North Dakota at this
hour.

Tricky forecast ahead for southeast Wyoming and western Nebraska
with multiple hazards. Arctic fronts tend to do this over this
general area, so decided to focus on the initial threat of
snowfall and the arrival of the arctic airmass. Will not go into
too much detail with wind chill temperatures since the primary
focus will be snowfall and snowfall rates in addition to the
arrival of the bulk of the arctic airmass.

Timing of the arctic cold front appears on track, and it should
start to sneak into our northern zones (Converse, Niobrara, Dawes
Counties) after midnight tonight, and moving into northern
Colorado sometime around sunrise Monday morning. Still not
detecting any freezing drizzle or fog at the arrival of the front.
We are pretty confident there will be some near the Laramie Range,
but the snowfall should begin pretty rapidly after FROPA, so will
not include fog in the forecast at this time mainly due to low
confidence in timing. Models continue to show better dynamic
forcing and higher snowfall rates in the Carbon County/Albany
County region. Models show two individual shortwaves, with the
western shortwave splitting as it ejects east. This shortwave will
likely be responsible for most of the snowfall across the area
where the current Winter Storm headlines are currently in effect.
The shortwave to the north will quickly eject east early on Monday
bringing snowfall to the northern plains. The southern shortwave
is expected to slow down on Monday as it ejects east as a surface
low forms in Utah and moves eastward into Colorado. This surface
low will bring enhanced convergence to the Continental Divide
region along with impressive overrunning/isentropic lift as the
arctic front dives southward. ECMWF and GFS even more aggressive
with strong frontogenesis and high OMEGA across all of Carbon and
western Albany county compared to this time yesterday. As the high
res guidance is starting to arrive at the beginning of this
event, two primary areas are highlighted to possibly receive
upwards 1 to 2+ inch per hour snowfall rates (The mountains should
do very well with this system regardless, possibly up to 2 feet
of snow in areas); which are west central and south central Carbon
County and a secondary area along the northern Snowy Range
foothills. Model QPF and WPC QPF support the dynamic forcing in
this area, so expect a moderate to high chance of 8+ inches of
snow with locally higher amounts near a foot. Decided to upgrade
the Winter Storm Watch to a Winter Storm Warning for all of Carbon
County given the ample dynamics and potential snowfall rates. In
addition, pressure gradient will reverse behind the arctic front,
resulting in strong gusty winds coming out of the east for the
I-80 Corridor from Rawlins to Arlington. Expect some blowing and
drifting snow, which will add to the already dangerous travel
conditions. With lesser snowfall amounts further east, issued a
Winter Weather Advisory for the Laramie Valley and the I-80
Summit. There are some uncertainties with this system, such as the
timing of the arctic front, when it stalls near the mountains,
and moisture source. If the front stalls further south (or north)
and the position of the surface low over Utah is stronger/weaker
than expected, this could change snowfall rates and snowfall
totals. However, given how consistent models have been, confidence
in these possibilities are relatively low.

Further east, mainly along and east of the I-25 corridor, lower
confidence overall in snowfall amounts. Kept the Winter Storm
Watch going for Platte County extending northeast into Dawes and
Sioux County in the northern Nebraska Panhandle. This is mainly
due to the energy splitting as the southern upper level trough
slows down in Utah/Colorado. All models show a piece of this
energy ejecting northeast into the SD/eastern Wyoming area, with a
secondary QPF maximum around Niobrara and Sioux/Dawes counties.
Dynamic forcing will mostly be from the upper level jet max.
Models indicate an enhanced area of upper level diffluence near
the right-entrance region of the departing jet. Combined with
shallow upslope flow along the Pine Ridge, snowfall totals could
exceed 6 inches in addition to periods of one half inch to one
inch per hour snowfall rates. Currently most confident with this
general area for a potential upgrade to a Winter Storm Warning
with lighter amounts between the northern Laramie Range and the
I-25 corridor near Douglas and Wheatland. Further south, pretty
confident in 1 to 2 inches along the I-80 corridor from Cheyenne
to Sidney with an overall lack of forcing. Another concern is the
snow ratios. If the bitter cold airmass moves into the high
plains too fast, the dendritic growth zone will be a bit too cold
and fail to live up to the 15:1 to 20:1 snow ratios. Leaning
towards high end Advisory amounts or low end Warning amounts at
this time with all this in mind. However, this area on the Pine
Ridge east of Lusk towards Chadron have observed higher snowfall
totals compared to forecasted snowfall in more than one occasion
this season. Considering that the start of the snow will be later
than areas further to the west, figure we have another few more
model runs to add the specific details.

For Monday night and Tuesday, arctic airmass starts to settle over
the region. For low and "high" temperatures, blended CONSALL and NBM
10 Percentile which give us low temperatures in the single digit
to teens below zero and highs in the single digits on Tuesday,
which some locations remaining below zero through the day up
north. There is a chance that most locations may remain below zero
through the day on Tuesday east of Carbon county. Wind Chill
Temperatures will likely be brutal for late February with readings
between 25 below and 40 below zero through early Tuesday morning.

.LONG TERM...(Tuesday night through Sunday)
Issued at 124 PM MST Sun Feb 20 2022

The main focus of the long term forecast is the brutally cold
temperatures that will continue through the week, as well as
opportunities for light snowfall on Wednesday. There is also some
forecast uncertainty regarding the exit of the arctic airmass next
weekend.

On the synoptic scale, a deep 500-mb trough will dig well to the
south across the Great Basin on Tuesday evening as the initial
shortwave responsible for our first round of snowfall clears out to
the east. There is some uncertainty in the timing of the break in
moisture Tuesday afternoon through Wednesday morning. If dry air
moves in a little slower and the clouds break on Tuesday night, we
could see temperatures drop below the current forecast. However,
soundings seem to show the low levels remaining fairly moist so even
if the mid levels dry and clear, the low clouds could keep
temperatures from bottoming out too much. The GFS shows increased
moisture pushing in from the south by 06z, with light snow returning
to the I-80 corridor through Wednesday. This second round lacks
significant jet support, and the strongest 500-mb vorticity will be
well to our south. However, there will be some warm air advection at
700-mb and weak upslope easterly flow in the arctic airmass in the
lowest levels. Forecast soundings show the warm nose reaching the
dendritic growth zone over Cheyenne Wednesday morning, but not
expecting significant QPF due to the lack of deep ascent and support
for snowfall rates. More likely, this will be a prolonged round of
light snow with very low rates through Wednesday night before the
trough axis shifts east on Thursday. The mountains could stand to do
a little better with this second round with moist southwest flow,
but again the best moisture and dynamic forcing remains to our
south.

With thick clouds overhead on Wednesday, it looks unlikely the
arctic airmass will budge at all. We'll be looking at another day of
very cold temperatures with highs in the single digits, and some
areas possibly staying below zero all day again. The cold may relent
some on Thursday, but we will still be well below average, and
struggle to reach the teens.

As the longwave trough shifts east on Thursday into Friday, guidance
is starting to show another shortwave dive south over the northern
Rockies. The GFS shows a decent round of mountain snowfall with
moist northwest flow amounting to nearly 0.5 in. additional QPF in
the Snowy Range by Saturday morning. The European shows much more
paltry QPF with ensemble support. Cluster analysis reveals that the
main difference in these outcomes can be traced to the strength of
the 500-mb ridge off the west coast. The European and its ensembles
show a narrow but intense ridge building off the west coast of North
America, reaching the Yukon in northern Canada. This effectively
cuts the shortwave off from the moisture source of the Pacific,
leading to the dry solution. The GFS and Canadian as well as their
ensembles display a shallower and more progressive ridge, extending
hardly much further north than the US/Canada border, which allows
moisture to flow over the top of the ridge and supply the passing
shortwave.

That divergence in the models also extends to the duration of the
arctic airmass next weekend. The GFS shows the ridge shifting
eastward quickly behind the shortwave Saturday, leading to nice warm
air advection by Sunday with the arctic air long gone and above
average temperatures returning. The European is much slower to push
the ridge through to the east, resulting in temperatures returning
to slightly below average by Sunday.

&&

.SHORT TERM...(This evening through Tuesday)
Issued at 330 PM MST Sun Feb 20 2022

Very pleasant weather this afternoon, even with breezy to locally
windy conditions at times and some high clouds moving across the
region. Temperatures have climbed into the middle 50s to low 60s
across most of the eastern plains along and east of the Interstate
25 corridor. Temperatures should max out in the upper 50s to
middle 60s before the sun begins to set.  Still need to monitor
the northern Snowy Range foothills, including Arlington and Elk
Mountain, for strong gusty winds. After a bit of a lull late this
morning, winds have increased once again closer to Elk Mountain
with gusts of 55 to 57 mph detected. Will handle this with a SPS
for now, but if gusts start climbing towards 65 mph...will likely
need a short fused High Wind Warning ahead of the arctic front.
Otherwise, you have one more relatively mild evening to enjoy
before the arctic blast plunges south tonight. Leading edge of the
arctic front is just starting to push into far northern Wyoming
near the Montana border, with winds shifting into the northeast
and afternoon temperatures beginning to fall into the 30s at this
time. If you go a few hundred miles northeast, temperatures have
lowered into the single digits and teens in North Dakota at this
hour.

Tricky forecast ahead for southeast Wyoming and western Nebraska
with multiple hazards. Arctic fronts tend to do this over this
general area, so decided to focus on the initial threat of
snowfall and the arrival of the arctic airmass. Will not go into
too much detail with wind chill temperatures since the primary
focus will be snowfall and snowfall rates in addition to the
arrival of the bulk of the arctic airmass.

Timing of the arctic cold front appears on track, and it should
start to sneak into our northern zones (Converse, Niobrara, Dawes
Counties) after midnight tonight, and moving into northern
Colorado sometime around sunrise Monday morning. Still not
detecting any freezing drizzle or fog at the arrival of the front.
We are pretty confident there will be some near the Laramie Range,
but the snowfall should begin pretty rapidly after FROPA, so will
not include fog in the forecast at this time mainly due to low
confidence in timing. Models continue to show better dynamic
forcing and higher snowfall rates in the Carbon County/Albany
County region. Models show two individual shortwaves, with the
western shortwave splitting as it ejects east. This shortwave will
likely be responsible for most of the snowfall across the area
where the current Winter Storm headlines are currently in effect.
The shortwave to the north will quickly eject east early on Monday
bringing snowfall to the northern plains. The southern shortwave
is expected to slow down on Monday as it ejects east as a surface
low forms in Utah and moves eastward into Colorado. This surface
low will bring enhanced convergence to the Continental Divide
region along with impressive overrunning/isentropic lift as the
arctic front dives southward. ECMWF and GFS even more aggressive
with strong frontogenesis and high OMEGA across all of Carbon and
western Albany county compared to this time yesterday. As the high
res guidance is starting to arrive at the beginning of this
event, two primary areas are highlighted to possibly receive
upwards 1 to 2+ inch per hour snowfall rates (The mountains should
do very well with this system regardless, possibly up to 2 feet
of snow in areas); which are west central and south central Carbon
County and a secondary area along the northern Snowy Range
foothills. Model QPF and WPC QPF support the dynamic forcing in
this area, so expect a moderate to high chance of 8+ inches of
snow with locally higher amounts near a foot. Decided to upgrade
the Winter Storm Watch to a Winter Storm Warning for all of Carbon
County given the ample dynamics and potential snowfall rates. In
addition, pressure gradient will reverse behind the arctic front,
resulting in strong gusty winds coming out of the east for the
I-80 Corridor from Rawlins to Arlington. Expect some blowing and
drifting snow, which will add to the already dangerous travel
conditions. With lesser snowfall amounts further east, issued a
Winter Weather Advisory for the Laramie Valley and the I-80
Summit. There are some uncertainties with this system, such as the
timing of the arctic front, when it stalls near the mountains,
and moisture source. If the front stalls further south (or north)
and the position of the surface low over Utah is stronger/weaker
than expected, this could change snowfall rates and snowfall
totals. However, given how consistent models have been, confidence
in these possibilities are relatively low.

Further east, mainly along and east of the I-25 corridor, lower
confidence overall in snowfall amounts. Kept the Winter Storm
Watch going for Platte County extending northeast into Dawes and
Sioux County in the northern Nebraska Panhandle. This is mainly
due to the energy splitting as the southern upper level trough
slows down in Utah/Colorado. All models show a piece of this
energy ejecting northeast into the SD/eastern Wyoming area, with a
secondary QPF maximum around Niobrara and Sioux/Dawes counties.
Dynamic forcing will mostly be from the upper level jet max.
Models indicate an enhanced area of upper level diffluence near
the right-entrance region of the departing jet. Combined with
shallow upslope flow along the Pine Ridge, snowfall totals could
exceed 6 inches in addition to periods of one half inch to one
inch per hour snowfall rates. Currently most confident with this
general area for a potential upgrade to a Winter Storm Warning
with lighter amounts between the northern Laramie Range and the
I-25 corridor near Douglas and Wheatland. Further south, pretty
confident in 1 to 2 inches along the I-80 corridor from Cheyenne
to Sidney with an overall lack of forcing. Another concern is the
snow ratios. If the bitter cold airmass moves into the high
plains too fast, the dendritic growth zone will be a bit too cold
and fail to live up to the 15:1 to 20:1 snow ratios. Leaning
towards high end Advisory amounts or low end Warning amounts at
this time with all this in mind. However, this area on the Pine
Ridge east of Lusk towards Chadron have observed higher snowfall
totals compared to forecasted snowfall in more than one occasion
this season. Considering that the start of the snow will be later
than areas further to the west, figure we have another few more
model runs to add the specific details.

For Monday night and Tuesday, arctic airmass starts to settle over
the region. For low and "high" temperatures, blended CONSALL and NBM
10 Percentile which give us low temperatures in the single digit
to teens below zero and highs in the single digits on Tuesday,
which some locations remaining below zero through the day up
north. There is a chance that most locations may remain below zero
through the day on Tuesday east of Carbon county. Wind Chill
Temperatures will likely be brutal for late February with readings
between 25 below and 40 below zero through early Tuesday morning.

.LONG TERM...(Tuesday night through Sunday)
Issued at 124 PM MST Sun Feb 20 2022

The main focus of the long term forecast is the brutally cold
temperatures that will continue through the week, as well as
opportunities for light snowfall on Wednesday. There is also some
forecast uncertainty regarding the exit of the arctic airmass next
weekend.

On the synoptic scale, a deep 500-mb trough will dig well to the
south across the Great Basin on Tuesday evening as the initial
shortwave responsible for our first round of snowfall clears out to
the east. There is some uncertainty in the timing of the break in
moisture Tuesday afternoon through Wednesday morning. If dry air
moves in a little slower and the clouds break on Tuesday night, we
could see temperatures drop below the current forecast. However,
soundings seem to show the low levels remaining fairly moist so even
if the mid levels dry and clear, the low clouds could keep
temperatures from bottoming out too much. The GFS shows increased
moisture pushing in from the south by 06z, with light snow returning
to the I-80 corridor through Wednesday. This second round lacks
significant jet support, and the strongest 500-mb vorticity will be
well to our south. However, there will be some warm air advection at
700-mb and weak upslope easterly flow in the arctic airmass in the
lowest levels. Forecast soundings show the warm nose reaching the
dendritic growth zone over Cheyenne Wednesday morning, but not
expecting significant QPF due to the lack of deep ascent and support
for snowfall rates. More likely, this will be a prolonged round of
light snow with very low rates through Wednesday night before the
trough axis shifts east on Thursday. The mountains could stand to do
a little better with this second round with moist southwest flow,
but again the best moisture and dynamic forcing remains to our
south.

With thick clouds overhead on Wednesday, it looks unlikely the
arctic airmass will budge at all. We'll be looking at another day of
very cold temperatures with highs in the single digits, and some
areas possibly staying below zero all day again. The cold may relent
some on Thursday, but we will still be well below average, and
struggle to reach the teens.

As the longwave trough shifts east on Thursday into Friday, guidance
is starting to show another shortwave dive south over the northern
Rockies. The GFS shows a decent round of mountain snowfall with
moist northwest flow amounting to nearly 0.5 in. additional QPF in
the Snowy Range by Saturday morning. The European shows much more
paltry QPF with ensemble support. Cluster analysis reveals that the
main difference in these outcomes can be traced to the strength of
the 500-mb ridge off the west coast. The European and its ensembles
show a narrow but intense ridge building off the west coast of North
America, reaching the Yukon in northern Canada. This effectively
cuts the shortwave off from the moisture source of the Pacific,
leading to the dry solution. The GFS and Canadian as well as their
ensembles display a shallower and more progressive ridge, extending
hardly much further north than the US/Canada border, which allows
moisture to flow over the top of the ridge and supply the passing
shortwave.

That divergence in the models also extends to the duration of the
arctic airmass next weekend. The GFS shows the ridge shifting
eastward quickly behind the shortwave Saturday, leading to nice warm
air advection by Sunday with the arctic air long gone and above
average temperatures returning. The European is much slower to push
the ridge through to the east, resulting in temperatures returning
to slightly below average by Sunday.

&&

.AVIATION...(For the 06Z TAFS through 06Z Monday night)
Issued at 1026 PM MST Sun Feb 20 2022

Wyoming TAFS...VFR at Rawlins until 16Z, then MVFR until 19Z, then
IFR. Wind gusts to 25 knots until 10Z.

VFR at Laramie until 19Z, then MVFR until 21Z, then IFR.
Wind gusts to 30 knots after 19Z. Low level wind shear until 16Z.

VFR at Cheyenne until 18Z, then IFR. Wind gusts to 25 knots from
14Z to 21Z.

Nebraska TAFS...VFR at Chadron and Alliance until 12Z, then MVFR
until 17Z, then IFR. Wind gusts to 30 knots.

VFR at Scottsbluff until 18Z, then IFR. Wind gusts to 28 knots
until 01Z.

VFR at Sidney until 20Z, then MVFR. Wind gusts to 33 knots after
14Z.

&&

.FIRE WEATHER...
Issued at 159 PM MST Sun Feb 20 2022

No fire weather concerns due to extreme cold & widespread snow.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...Winter Storm Watch from 5 AM MST Monday through Tuesday morning
     for WYZ101>103-106-107.

     Winter Weather Advisory from 3 PM Monday to 11 AM MST Tuesday
     for WYZ115-116.

     Winter Storm Warning from 5 AM Monday to 11 AM MST Tuesday for
     WYZ104-105-109>111-113.

     Winter Storm Warning until 11 AM MST Tuesday for WYZ112-114.

NE...Winter Storm Watch from 5 AM MST Monday through Tuesday morning
     for NEZ002-095.

&&

UPDATE...AW
SHORT TERM...TJT
LONG TERM...MN
AVIATION...RUBIN
FIRE WEATHER...CLH/TJT

Hazardous Weather Outlook
National Weather Service Cheyenne WY
347 PM MST Sun Feb 20 2022

NEZ003-019>021-054-055-096-WYZ108-115>119-212300-
Box Butte County-Scotts Bluff County-Banner County-Morrill County-
Kimball County-Cheyenne County-Southern Sioux County-
Goshen County-Laramie Valley-South Laramie Range-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
347 PM MST Sun Feb 20 2022

This hazardous weather outlook is for portions of panhandle
Nebraska and far southeast Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Arctic cold front will move south into the region late tonight and
early Monday morning. Brief patchy dense fog is possible once the
front moves south across the area.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Snow returns Monday through Wednesday of next week with bitterly
cold temperatures behind an arctic front. Accumulations are
possible that could impact travel.

.Spotter information statement...

Spotter activation will not be needed.

WYZ104-105-109>114-212300-
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-
347 PM MST Sun Feb 20 2022

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

Occasional strong gusty winds will continue over the Wind Prone
areas of southeast Wyoming tonight. These south to southwest winds
should diminish briefly once the arctic front moves into central
Wyoming by early Monday morning.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH FRIDAY

Snow, gusty winds, and bitter cold temperatures expected Monday
through Wednesday with bitterly cold temperatures likely
continuing into Thursday. Winter Storm Warnings are in effect for
all of Carbon county and portions of Albany County. Please refer
to the Winter Storm Warning for additional details on timing and
snowfall amounts.

.Spotter information statement...

Spotters are urged to report snowfall totals on Tuesday.

NEZ002-095-WYZ101>103-106-107-212300-
Dawes County-Northern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-
347 PM MST Sun Feb 20 2022

This hazardous weather outlook is for portions the northern
Nebraska Panhandle and east central Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Arctic cold front will move south across the region tonight.
Temperatures will quickly lower to the single digits behind the
front with patchy dense fog and snow flurries possible.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Snow and bitter cold temperatures expected Monday through
Wednesday with bitterly cold temperatures likely continuing into
Thursday. Winter Storm Watch remains in effect Monday and Monday
night for snow accumulations over 5 inches. Dangerous Wind Chill
Temperatures of 40 below zero are possible Monday night and
Tuesday morning.

.Spotter information statement...

Spotter activation possible Monday and Tuesday.