Winter Storm Warning 12, NWS Riverton, WY

750 
WWUS45 KRIW 230115
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
615 PM MST Wed Dec 22 2021

WYZ001-002-012-231200-
/O.CON.KRIW.WS.W.0012.211223T0600Z-211225T0600Z/
Yellowstone National Park-Absaroka Mountains-
Teton and Gros Ventre Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
615 PM MST Wed Dec 22 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 PM MST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 
  24 inches, with higher amounts possible above 9000 feet. Winds 
  gusting as high as 55 mph.

* WHERE...Yellowstone National Park and Teton and Gros Ventre 
  Mountains.

* WHEN...From 11 PM this evening to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ013-231200-
/O.CON.KRIW.WS.W.0012.211223T0600Z-211225T0600Z/
Jackson Hole-
Including the city of Jackson
615 PM MST Wed Dec 22 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 PM MST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 
  12 inches. Winds gusting as high as 45 mph.

* WHERE...Jackson Hole.

* WHEN...From 11 PM this evening to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ023-231200-
/O.CON.KRIW.WS.W.0012.211223T1300Z-211225T0600Z/
Star Valley-
Including the cities of Afton, Alpine, Star Valley Ranch, 
and Thayne
615 PM MST Wed Dec 22 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 AM THURSDAY TO
11 PM MST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 
  10 inches. Winds gusting as high as 40 mph.

* WHERE...Star Valley.

* WHEN...From 6 AM Thursday to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ014-024-025-231200-
/O.CON.KRIW.WS.W.0012.211223T1300Z-211225T0600Z/
Wind River Mountains West-Salt River and Wyoming Ranges-
Upper Green River Basin Foothills-
Including the city of Pinedale
615 PM MST Wed Dec 22 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 AM THURSDAY TO
11 PM MST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 18
  inches in the mountains, with 5 to 10 inches for Pinedale and
  Daniel. Winds gusting as high as 60 mph in the mountains.

* WHERE...Wind River Mountains West, Salt River and Wyoming 
  Ranges and Upper Green River Basin Foothills.

* WHEN...From 6 AM Thursday to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible. 
  Widespread blowing snow could significantly reduce visibility. 
  The hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ027-231200-
/O.CON.KRIW.WS.W.0012.211223T1800Z-211225T0600Z/
South Lincoln County-
Including the cities of Kemmerer and Cokeville
615 PM MST Wed Dec 22 2021

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

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 
  inches. Winds gusting as high as 40 mph.

* WHERE...South Lincoln County.

* WHEN...From 11 AM Thursday to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ028>030-231200-
/O.CON.KRIW.WW.Y.0039.211224T0000Z-211225T0100Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
615 PM MST Wed Dec 22 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THURSDAY
TO 6 PM MST FRIDAY...

* WHAT...Snow and blowing snow expected. Total snow 
  accumulations of 2 to 4 inches. Winds gusting as high as 50 
  mph.

* WHERE...Rock Springs and Green River, Flaming Gorge, and East 
  Sweetwater County.

* WHEN...From 5 PM Thursday to 6 PM MST Friday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning or evening commute.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/riw

161 
WWUS45 KRIW 230844
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
144 AM MST Thu Dec 23 2021

WYZ028>030-232300-
/O.UPG.KRIW.WW.Y.0039.211224T0000Z-211225T0100Z/
/O.EXB.KRIW.WS.W.0012.211224T0000Z-211225T0100Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
144 AM MST Thu Dec 23 2021

...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO
6 PM MST FRIDAY...

* WHAT...Snow and blowing snow expected. Total snow accumulations
  of 2 to 4 inches. Winds gusting as high as 55 mph.

* WHERE...Rock Springs and Green River, Flaming Gorge and East 
  Sweetwater County.

* WHEN...From 5 PM Thursday to 6 PM MST Friday.

* IMPACTS...Travel could be very difficult. Blowing snow could
  significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ001-002-012-232300-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Yellowstone National Park-Absaroka Mountains-
Teton and Gros Ventre Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
144 AM MST Thu Dec 23 2021

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

* WHAT...Heavy snow. Total snow accumulations of 12 to 24 inches,
  with higher amounts possible above 9000 feet. Winds gusting as
  high as 70 mph.

* WHERE...Yellowstone National Park and Teton and Gros Ventre 
  Mountains.

* WHEN...From 11 PM this evening to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible.
  Widespread blowing snow could significantly reduce visibility. 
  Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ013-232300-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Jackson Hole-
Including the city of Jackson
144 AM MST Thu Dec 23 2021

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

* WHAT...Heavy snow. Additional snow accumulations of 8 to 12 
  inches. Winds gusting as high as 50 mph.

* WHERE...Jackson Hole.

* WHEN...From 11 PM this evening to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible. Patchy
  blowing snow could significantly reduce visibility. Gusty winds
  could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ023-232300-
/O.CON.KRIW.WS.W.0012.211223T1300Z-211225T0600Z/
Star Valley-
Including the cities of Afton, Alpine, Star Valley Ranch, 
and Thayne
144 AM MST Thu Dec 23 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 AM THIS MORNING
TO 11 PM MST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 10
  inches. Winds gusting as high as 40 mph.

* WHERE...Star Valley.

* WHEN...From 6 AM Thursday to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ014-024-025-232300-
/O.CON.KRIW.WS.W.0012.211223T1300Z-211225T0600Z/
Wind River Mountains West-Salt River and Wyoming Ranges-
Upper Green River Basin Foothills-
Including the city of Pinedale
144 AM MST Thu Dec 23 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 AM THIS MORNING
TO 11 PM MST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 18
  inches in the mountains, with 3 to 8 inches for Pinedale and 
  Daniel. Winds gusting as high as 70 mph in the mountains.

* WHERE...Wind River Mountains West, Salt River and Wyoming 
  Ranges and Upper Green River Basin Foothills.

* WHEN...From 6 AM Thursday to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible.
  Widespread blowing snow could significantly reduce visibility. 
  Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ027-232300-
/O.CON.KRIW.WS.W.0012.211223T1800Z-211225T0600Z/
South Lincoln County-
Including the cities of Kemmerer and Cokeville
144 AM MST Thu Dec 23 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING
TO 11 PM MST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8
  inches. Winds gusting as high as 50 mph.

* WHERE...South Lincoln County.

* WHEN...From 11 AM Thursday to 11 PM MST Friday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ026-232300-
/O.NEW.KRIW.WW.Y.0040.211223T1800Z-211225T0100Z/
Upper Green River Basin-
Including the cities of La Barge, Big Piney, and Farson
144 AM MST Thu Dec 23 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO
6 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 4 
  inches. Winds gusting as high as 50 mph.

* WHERE...Upper Green River Basin.

* WHEN...From 11 AM this morning to 6 PM MST Friday.

* IMPACTS...Plan on slippery road conditions. Blowing snow could
  significantly reduce visibility. Gusty winds could bring down 
  tree branches.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/riw

459 
WWUS45 KRIW 232058
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
158 PM MST Thu Dec 23 2021

WYZ001-002-012-241200-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Yellowstone National Park-Absaroka Mountains-
Teton and Gros Ventre Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
158 PM MST Thu Dec 23 2021

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

* WHAT...Heavy snow. Total snow accumulations of 12 to 24 
  inches, with higher amounts possible above 9000 feet. Winds 
  gusting as high as 70 mph.

* WHERE...Yellowstone National Park and Teton and Gros Ventre 
  Mountains.

* WHEN...Until 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible. 
  Widespread blowing snow could significantly reduce visibility. 
  Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ013-241200-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Jackson Hole-
Including the city of Jackson
158 PM MST Thu Dec 23 2021

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

* WHAT...Heavy snow. Additional snow accumulations of 8 to 12 
  inches. Winds gusting as high as 50 mph.

* WHERE...Jackson Hole.

* WHEN...Until 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible. Patchy 
  blowing snow could significantly reduce visibility. Gusty 
  winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ023-241200-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Star Valley-
Including the cities of Afton, Alpine, Star Valley Ranch, 
and Thayne
158 PM MST Thu Dec 23 2021

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

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 
  10 inches. Winds gusting as high as 40 mph.

* WHERE...Star Valley.

* WHEN...Until 11 PM MST Friday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ014-024-025-241200-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Wind River Mountains West-Salt River and Wyoming Ranges-
Upper Green River Basin Foothills-
Including the city of Pinedale
158 PM MST Thu Dec 23 2021

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

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 
  18 inches in the mountains, with 3 to 8 inches for Pinedale 
  and Daniel. Winds gusting as high as 70 mph in the mountains.

* WHERE...Wind River Mountains West, Salt River and Wyoming 
  Ranges and Upper Green River Basin Foothills.

* WHEN...Until 11 PM MST Friday.

* IMPACTS...Travel could be very difficult to impossible. 
  Widespread blowing snow could significantly reduce visibility. 
  Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ027-241200-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
South Lincoln County-
Including the cities of Kemmerer and Cokeville
158 PM MST Thu Dec 23 2021

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

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 
  inches. Winds gusting as high as 50 mph.

* WHERE...South Lincoln County.

* WHEN...Until 11 PM MST Friday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ028>030-241200-
/O.CON.KRIW.WS.W.0012.211224T0000Z-211225T0100Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
158 PM MST Thu Dec 23 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 6 PM MST FRIDAY...

* WHAT...Snow and blowing snow expected. Total snow 
  accumulations of 2 to 4 inches. Winds gusting as high as 55 
  mph.

* WHERE...Rock Springs and Green River, Flaming Gorge and East 
  Sweetwater County.

* WHEN...From 5 PM this afternoon to 6 PM MST Friday.

* IMPACTS...Travel could be very difficult. Blowing snow could 
  significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ026-241200-
/O.CON.KRIW.WW.Y.0040.000000T0000Z-211225T0100Z/
Upper Green River Basin-
Including the cities of La Barge, Big Piney, and Farson
158 PM MST Thu Dec 23 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MST
FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 4 
  inches. Winds gusting as high as 50 mph.

* WHERE...Upper Green River Basin.

* WHEN...Until 6 PM MST Friday.

* IMPACTS...Plan on slippery road conditions. Blowing snow could 
  significantly reduce visibility. Gusty winds could bring down 
  tree branches.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/riw

913 
WWUS45 KRIW 240914
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
214 AM MST Fri Dec 24 2021

WYZ013-242300-
/O.CAN.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
/O.NEW.KRIW.WW.Y.0041.211224T0914Z-211225T0600Z/
Jackson Hole-
Including the city of Jackson
214 AM MST Fri Dec 24 2021

...WINTER STORM WARNING DOWNGRADED...
...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 PM MST THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations of 2 to 5 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Jackson Hole.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be difficult. Patchy blowing snow could
  reduce visibility. The wintry conditions could impact Christmas
  Eve travel.

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.

&&

$$

WYZ023-242300-
/O.CAN.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
/O.NEW.KRIW.WW.Y.0041.211224T0914Z-211225T0600Z/
Star Valley-
Including the cities of Afton, Alpine, Star Valley Ranch, 
and Thayne
214 AM MST Fri Dec 24 2021

...WINTER STORM WARNING DOWNGRADED...
...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 PM MST THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches.
  Winds gusting as high as 30 mph.

* WHERE...Star Valley.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be difficult. Patchy blowing snow could
  reduce visibility. The wintry conditions could impact Christmas
  Eve travel.

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.

&&

$$

WYZ027-242300-
/O.CAN.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
/O.NEW.KRIW.WW.Y.0041.211224T0914Z-211225T0600Z/
South Lincoln County-
Including the cities of Kemmerer and Cokeville
214 AM MST Fri Dec 24 2021

...WINTER STORM WARNING DOWNGRADED...
...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 PM MST THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches. 
  Winds gusting as high as 40 mph.

* WHERE...South Lincoln County.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be difficult. Blowing snow could reduce 
  visibility. The wintry conditions could impact Christmas Eve 
  travel.

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.

&&

$$

WYZ028>030-241015-
/O.CAN.KRIW.WS.W.0012.000000T0000Z-211225T0100Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
214 AM MST Fri Dec 24 2021

...WINTER STORM WARNING IS CANCELLED...

Warmer than forecast temperatures and less atmospheric moisture 
have kept snowfall amounts lower than expected, and blowing snow 
with widespread hazardous travel is now not expected. Snow showers
during the evening on Christmas Eve could still cause locally 
slick travel, so remain cautious while driving.

$$

WYZ026-241015-
/O.CAN.KRIW.WW.Y.0040.000000T0000Z-211225T0100Z/
Upper Green River Basin-
Including the cities of La Barge, Big Piney, and Farson
214 AM MST Fri Dec 24 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Warmer than forecast temperatures and less atmospheric moisture 
have kept snowfall amounts lower than expected, and blowing snow 
with widespread hazardous travel is now not expected. Snow showers
during the evening on Christmas Eve could still cause locally 
slick travel, so remain cautious while driving.

$$

WYZ001-002-012-242300-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Yellowstone National Park-Absaroka Mountains-
Teton and Gros Ventre Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
214 AM MST Fri Dec 24 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Heavy snow. Additional snow accumulations of 3 to 9
  inches, with the higher totals in the higher terrain. Winds 
  gusting as high as 50 mph.

* WHERE...Teton and Gros Ventre Mountains, Yellowstone National 
  Park and Absaroka Mountains.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be very difficult over mountain passes. 
  Blowing snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ014-024-025-242300-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Wind River Mountains West-Salt River and Wyoming Ranges-
Upper Green River Basin Foothills-
Including the city of Pinedale
214 AM MST Fri Dec 24 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Heavy snow. Additional snow accumulations of 3 to 9
  inches, with the higher totals in the higher terrain. Winds
  gusting as high as 45 mph.

* WHERE...Salt River and Wyoming Ranges, Upper Green River Basin 
  Foothills and Wind River Mountains West.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be very difficult over mountain passes.
  Blowing snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

For more information from the National Weather Service visit
http://weather.gov/riw

094 
WWUS45 KRIW 242243
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
343 PM MST Fri Dec 24 2021

WYZ001-002-012-250600-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Yellowstone National Park-Absaroka Mountains-
Teton and Gros Ventre Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
343 PM MST Fri Dec 24 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Heavy snow. Additional snow accumulations of up to 5 
  inches. Winds gusting as high as 40 mph.

* WHERE...Teton and Gros Ventre Mountains, Yellowstone National 
  Park and Absaroka Mountains.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be very difficult over mountain passes. 
  Blowing snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ014-024-025-250600-
/O.CON.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Wind River Mountains West-Salt River and Wyoming Ranges-
Upper Green River Basin Foothills-
Including the city of Pinedale
343 PM MST Fri Dec 24 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Heavy snow. Additional snow accumulations of up to 6 
  inches. Winds gusting as high as 45 mph.

* WHERE...Salt River and Wyoming Ranges, Upper Green River Basin 
  Foothills and Wind River Mountains West.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be very difficult over mountain passes. 
  Blowing snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

$$

WYZ013-250600-
/O.CON.KRIW.WW.Y.0041.000000T0000Z-211225T0600Z/
Jackson Hole-
Including the city of Jackson
343 PM MST Fri Dec 24 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Jackson Hole.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be difficult. Patchy blowing snow could 
  reduce visibility. The wintry conditions could impact 
  Christmas Eve travel.

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.

&&

$$

WYZ023-250600-
/O.CON.KRIW.WW.Y.0041.000000T0000Z-211225T0600Z/
Star Valley-
Including the cities of Afton, Alpine, Star Valley Ranch, 
and Thayne
343 PM MST Fri Dec 24 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches.

* WHERE...Star Valley.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be difficult. Patchy blowing snow could 
  reduce visibility. The wintry conditions could impact 
  Christmas Eve travel.

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.

&&

$$

WYZ027-250600-
/O.CON.KRIW.WW.Y.0041.000000T0000Z-211225T0600Z/
South Lincoln County-
Including the cities of Kemmerer and Cokeville
343 PM MST Fri Dec 24 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches. 
  Winds gusting as high as 45 mph.

* WHERE...South Lincoln County.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be difficult. Blowing snow could reduce 
  visibility. The wintry conditions could impact Christmas Eve 
  travel.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/riw

787 
WWUS45 KRIW 250553
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1053 PM MST Fri Dec 24 2021

WYZ001-002-012-250700-
/O.EXP.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Yellowstone National Park-Absaroka Mountains-
Teton and Gros Ventre Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
1053 PM MST Fri Dec 24 2021

...WINTER STORM WARNING WILL EXPIRE AT 11 PM MST THIS EVENING...

Some light snow will occur overnight with an inch or two of new
snow. 

$$

WYZ014-024-025-250700-
/O.EXP.KRIW.WS.W.0012.000000T0000Z-211225T0600Z/
Wind River Mountains West-Salt River and Wyoming Ranges-
Upper Green River Basin Foothills-
Including the city of Pinedale
1053 PM MST Fri Dec 24 2021

...WINTER STORM WARNING WILL EXPIRE AT 11 PM MST THIS EVENING...

Some light snow will occur overnight with an inch of new snow
possible.

$$

WYZ013-250700-
/O.EXP.KRIW.WW.Y.0041.000000T0000Z-211225T0600Z/
Jackson Hole-
Including the city of Jackson
1053 PM MST Fri Dec 24 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MST THIS
EVENING...

Some light snow will occur overnight with an inch or two of new
snow possible.

$$

WYZ023-250700-
/O.EXP.KRIW.WW.Y.0041.000000T0000Z-211225T0600Z/
Star Valley-
Including the cities of Afton, Alpine, Star Valley Ranch, 
and Thayne
1053 PM MST Fri Dec 24 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MST THIS
EVENING...

Some light snow will occur overnight with an inch or two of new
snow possible.

$$

WYZ027-250700-
/O.EXP.KRIW.WW.Y.0041.000000T0000Z-211225T0600Z/
South Lincoln County-
Including the cities of Kemmerer and Cokeville
1053 PM MST Fri Dec 24 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MST THIS
EVENING...

Some light snow will occur overnight with an inch or two of new
snow.

$$

For more information from the National Weather Service visit
http://weather.gov/riw

Area Forecast Discussion
National Weather Service Riverton WY
1059 AM MST Wed Dec 22 2021

.SHORT TERM...Today through Thursday
Issued at 241 AM MST Wed Dec 22 2021

Zonal flow will continue to exist over the region today keeping the
area mostly dry with the exception of the western mountains. The
main concerns through the day today is the always present threat for
high wind. There is thermal stacking present and downsloping looks
to exist but high wind threats look mostly marginal. Opting for an
SPS for the Cody Foothills this afternoon to highlight the threats
for high wind. The second concern for today is the potential upslope
snow showers with the westerly flow aloft. Minor snow accumulations
of 1 to 3 inches can be expected through this evening.

Attention then turns to the messy system that is progged to impact
the area through the next couple days. As models continue to
struggle with this event details are still a little hazy. We do know
a significant winter storm is expected to take place with a general
consensus on the impacts. Winter storm watches have been issued for
those impacts as the amount of moisture present could create heavy
snow. The second piece being the wind as a strong jet streak
associated with the PACNW trough will keep the western mountains in
snowy, windy and dangerous conditions. Snow will be mostly confined
to the western mountains through the short-term before spreading
eastward into the long-term period. However, looking at adding
southern Lincoln county to the winter storm watch for significant
impacts of wind and snow. As for the eastern areas, they won't be
neglected the entire short-term as high wind potential will exist
and high wind watches have been issued to reflect the potential for
gusts over 60 mph for portions of Johnson, Natrona and Fremont
counties.

.LONG TERM...Thursday night through Tuesday
Issued at 241 AM MST Wed Dec 22 2021

The core of a 170+ kt jet will remain over the Cowboy State Thursday
night, before another trough digs and strengthens over the PACNW.
The main trough axis, with the low center off the CA coast, will
gradually move onshore Friday. The combination of these systems will
cause the core of the jet to exit eastward over the Plains by Friday
evening. This will result in continued upslope flow over the west.
The left front quadrant of the jet will also aid in the lift over
this area. Snow will also spread across the south Thursday night and
continue into Christmas Eve. Will add southern Lincoln County to the
Winter Storm Watch, as snowfall accumulations over 6 inches look
likely, along with south to southwest winds with gusts up to 30 mph.
The moist, west/southwest flow will continue over the area on
Christmas, continuing the snow over the west. This flow looks to
continue Sunday and Monday as well, but snowfall amounts will be
lighter compared to to what is expected at the beginning of this
event. While temperatures will be seasonal west of the Divide, they
will continue to be above normal east of the Divide. The windy
conditions will also continue east of the Divide, especially Natrona
County, on Christmas Eve and Christmas Day.

For the rest of the period, the cyclonic flow pattern will remain in
place. The moist west-southwest flow will continue to bring snow to
western portions, while areas east of the Divide remain mostly
dry.

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 1049 AM MST Wed Dec 22 2021

East of the Divide...KCOD/KCPR/KLND/KRIW/KWRL and KRKS Terminals

Gusty southwest winds will continue for KCPR and KCOD this
afternoon, with gusts of 35 to 45kts expected. Models have backed
off of gusts at KRKS today and tonight, with remaining sites
seeing lighter winds through 18Z Thu. Cigs and vis remain VFR
through 24 hours.

West of the Divide...KBPI/KJAC/KPNA Terminals

Cloud cover is increasing as the next system moves toward western
WY. Cigs will begin to lower this afternoon, with -SN developing
at KJAC by 00Z, and at KBPI/KPNA by 06Z tonight. VIS will decrease
considerably for KJAC tonight as gusty winds blow around falling
snow. Snow impacts increase at KBPI/KPNA after 12Z Thu, with snow
impacts continuing at all three sites through the day Thursday.

&&

.FIRE WEATHER...
Issued AT 241 AM MST Wed Dec 22 2021

Western mountain snow and strong to gusty winds will exist today.
Smoke dispersal and venting will be excellent in most areas except
the western mountains where smoke dispersal and venting will be
poor. Snow will increase in coverage through the day Thursday for
the western mountains and high winds will increase in the eastern
areas mainly for Johnson and Natrona counties. As the main forcing
drags southeastward, precipitation will increase in coverage and
spread over the divide and linger through Saturday morning. Another
system is progged to move through the area right on the heels of
this system for Sunday.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
High Wind Watch from Thursday morning through Thursday evening
for WYZ010-015-019-020.

Winter Storm Watch from Thursday morning through Friday
afternoon for WYZ014-023>025.

Winter Storm Watch from this evening through Friday afternoon
for WYZ001-012-013.

Winter Storm Watch from Thursday evening through Friday
afternoon for WYZ027.

&&

SHORT TERM...Vorst
LONG TERM...LaVoie
AVIATION...Straub
FIRE WEATHER...Vorst

Hazardous Weather Outlook
National Weather Service Riverton WY
324 AM MST Wed Dec 22 2021

WYZ001>020-022>030-231030-
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-
324 AM MST Wed Dec 22 2021

...Winter Storm Watch in effect for western portions Wednesday
night through Friday morning...

...High Wind Watch in effect for portions of Fremont, Natrona and
Johnson counties through late Friday evening...

This Hazardous Weather Outlook is for Western and Central
Wyoming.

.DAY ONE...Today and Tonight.

Winds will continue to impact the Cody Foothills but remain under
highlight criteria. Snow showers return to areas west of the
Divide this evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday into Friday...High wind returns to areas east of the
Divide Thursday. Snow continues west of the Divide before
spreading eastward through the day Friday.

Christmas through Tuesday...snow continues west of the Divide.

.SPOTTER INFORMATION STATEMENT...

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