Alert archive / Wyoming / Winter Storm Warnings in 2021

Winter Storm Warning 20, NWS Cheyenne, WY

December 25, 2021Albany County, Carbon County, Wyoming

NWS Cheyenne, WY issued this winter storm warning at Dec 25, 2021, 12:50 PM MST for Albany County, Carbon County, Wyoming. It took effect at Dec 25, 2021, 11:00 PM MST. It was in force for 57 hr. 40 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Dec 25, 2021, 12:50 PM MST (19:50 UTC)
In effect from
Dec 25, 2021, 11:00 PM MST
Expired
Dec 28, 2021, 8:00 AM MST
In force
57 hr
Issued by
NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY

The radar

The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 19:54 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Dec 26, 8:00 AM MSTSNOW 4.52 Nw Jack Creek Campgro, WYDIVIDE PEAK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8880 FEET. SNOW WATER EQUIVALENT IS 0.3 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 8:00 AM MSTSNOW 4.54 Nw Hog Park Reservoir, WYLITTLE SNAKE RIVER SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8915 FEET. SNOW WATER EQUIVALENT IS 0.3 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 8:00 AM MSTSNOW 61 Nw Whiskey Park, WYWHISKEY PARK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8950 FEET. SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 8:00 AM MSTSNOW 6W Deep Creek Campground, WYSAND LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10050 FEET. SNOW WATER EQUIVALENT IS 0.3 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 8:00 AM MSTSNOW 7.58 Ene Hog Park Campgrou, WYBLACKHALL MOUNTAIN SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 9820 FEET. SNOW WATER EQUIVALENT IS 0.5 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 15 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 8:00 AM MSTSNOW 82 Ne Rob Roy Reservoir, WYCINNABAR PARK SNOTEL IN THE SNOWY RANGE. ELEVATION 9574 FEET. SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 8:00 AM MSTSNOW 83 Wnw Sugar Loaf Campgr, WYMEDICINE BOW SNOTEL IN THE SNOWY RANGE. ELEVATION 10500 FEET. SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 8:00 AM MSTSNOW 8Ene Nash Fork Campgroun, WYBROOKLYN LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10240 FEET. SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 8:00 AM MSTSNOW 105 Wsw Sugar Loaf Campgr, WYNORTH FRENCH CREEK SNOTEL IN THE SNOWY RANGE. ELEVATION 10130 FEET. SNOW WATER EQUIVALENT IS 0.5 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 9 HOURS.
Dec 26, 12:02 PM MSTSNOW 09 W Rawlins, WYSNOW SQUALL WITH HADSL1 UPR SITE GUSTS 64 MPH.
Dec 26, 12:21 PM MSTSNOW 0Arlington, WYINTERSTATE 80 CLOSED FROM MILE MARKER 187 CRESTON JUNCTION TO MILE MARKER 290 AT LARAMIE DUE TO WINTER WEATHER CONDITIONS. SNOW SQUALL MOVING THROUGH THIS AREA CREATED VERY STRONG WINDS AND NEAR ZERO VISIBILTIES.
Dec 26, 1:12 PM MSTSNOW 01 Nnw Arlington, WYARLINGTON WYDOT SITE. SNOW SQUALL WITH VISIBILITY UNDER 1/4 MILE AND WIND GUSTS TO 58 MPH.
Dec 26, 1:30 PM MSTSNOW 03 S Tie City Campground, WYSUMMIT WYDOT SITE. SNOW SQUALL WITH VISIBILITY UNDER 1/4 MILE WITH WIND GUSTS TO 30 MPH.
Dec 26, 1:30 PM MSTSNOW 0Laramie, WYSNOW SQUALL. VISIBILITY 1/4 MILE OR LESS WITH HEAVY SNOW AND WINDS GUSTING TO 40 MPH.
Dec 26, 1:34 PM MSTSNOW 0Buford, WYINTERSTATE 80 CLOSED FROM LARAMIE MILE MARKER 290 TO CHEYENNE MILE MARKER 348 DUE TO WINTER WEATHER CONDITIONS. SNOW SQUALL MOVING THROUGH THIS AREA WITH VISIBILITY UNDER 1/4 MILE AND WINDS GUSTING TO 40 TO 50 MPH.
Dec 26, 1:46 PM MSTSNOW 012 Ene North Fork Campg, WYQUEALY DOME WYDOT SITE. SNOW SQUALL WITH VISIBILITY UNDER 1/4 MILE AND WIND GUSTS TO 44 MPH.
Dec 27, 6:00 AM MSTSNOW 7.2Nw Ryan Park Campground, WYSOUTH BRUSH CREEK SNOTEL IN THE SNOWY RANGE. ELEVATION 8440 FEET. SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 18 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS.
Dec 27, 6:00 AM MSTSNOW 102 Nw Jack Creek Campgro, WYDIVIDE PEAK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8880 FEET. SNOW WATER EQUIVALENT IS 0.5 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS.
Dec 27, 6:00 AM MSTHEAVY SNOW 122 Wsw Bottle Creek Camp, WYWEBBER SPRINGS SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 9250 FEET. SNOW WATER EQUIVALENT IS 0.6 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS.
Dec 27, 6:00 AM MSTHEAVY SNOW 12W Deep Creek Campground, WYSAND LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10050 FEET. SNOW WATER EQUIVALENT IS 0.6 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS.
Dec 27, 6:00 AM MSTHEAVY SNOW 142 E Battle Lake, WYOLD BATTLE SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 10000 FEET. SNOW WATER EQUIVALENT IS 0.7 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS. 12 INCHES RECEIVED 26/1400.
Dec 27, 6:00 AM MSTHEAVY SNOW 144 Nw Hog Park Reservoir, WYLITTLE SNAKE RIVER SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8915 FEET. SNOW WATER EQUIVALENT IS 0.7 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS. 12 INCHES RECEIVED AT 26/2100.
Dec 27, 6:00 AM MSTHEAVY SNOW 165 Wsw Sugar Loaf Campgr, WYNORTH FRENCH CREEK SNOTEL IN THE SNOWY RANGE. ELEVATION 10130 FEET. SNOW WATER EQUIVALENT IS 0.8 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS. 12 INCHES RECEIVED 26/1200.
Dec 27, 6:00 AM MSTHEAVY SNOW 182 Ne Rob Roy Reservoir, WYCINNABAR PARK SNOTEL IN THE SNOWY RANGE. ELEVATION 9574 FEET. SNOW WATER EQUIVALENT IS 0.9 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS. 12 INCHES RECEIVED 26/1200.
Dec 27, 6:00 AM MSTHEAVY SNOW 18Ene Nash Fork Campgroun, WYBROOKLYN LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10240 FEET. SNOW WATER EQUIVALENT IS 0.9 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS. 12 INCHES RECEIVED 26/1100.
Dec 27, 6:00 AM MSTHEAVY SNOW 203 Wnw Sugar Loaf Campgr, WYMEDICINE BOW SNOTEL IN THE SNOWY RANGE. ELEVATION 10500 FEET. SNOW WATER EQUIVALENT IS 1.0 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 25 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS. 12 INCHES RECEIVED 26/1300.
Dec 27, 6:00 AM MSTHEAVY SNOW 241 Nw Whiskey Park, WYWHISKEY PARK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8950 FEET. SNOW WATER EQUIVALENT IS 1.2 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS. 12 INCHES RECEIVED AT 26/1200.
Dec 27, 6:00 AM MSTHEAVY SNOW 308 Ene Hog Park Campgrou, WYBLACKHALL MOUNTAIN SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 9820 FEET. SNOW WATER EQUIVALENT IS 1.5 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 31 HOURS. 12 INCHES RECEIVED 26/1000.
Dec 28, 6:00 AM MSTHEAVY SNOW 122 Nw Jack Creek Campgro, WYDIVIDE PEAK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8880 FEET. SNOW WATER EQUIVALENT IS 0.6 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 12.6Nw Ryan Park Campground, WYSOUTH BRUSH CREEK SNOTEL IN THE SNOWY RANGE. ELEVATION 8440 FEET. SNOW WATER EQUIVALENT IS 0.7 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 18 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 202 Wsw Bottle Creek Camp, WYWEBBER SPRINGS SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 9250 FEET. SNOW WATER EQUIVALENT IS 1.0 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 204 Nw Hog Park Reservoir, WYLITTLE SNAKE RIVER SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8915 FEET. SNOW WATER EQUIVALENT IS 1.0 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 222 E Battle Lake, WYOLD BATTLE SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 10000 FEET. SNOW WATER EQUIVALENT IS 1.1 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 22W Deep Creek Campground, WYSAND LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10050 FEET. SNOW WATER EQUIVALENT IS 1.1 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 265 Wsw Sugar Loaf Campgr, WYNORTH FRENCH CREEK SNOTEL IN THE SNOWY RANGE. ELEVATION 10130 FEET. SNOW WATER EQUIVALENT IS 1.3 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 282 Ne Rob Roy Reservoir, WYCINNABAR PARK SNOTEL IN THE SNOWY RANGE. ELEVATION 9574 FEET. SNOW WATER EQUIVALENT IS 1.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 321 Nw Whiskey Park, WYWHISKEY PARK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8950 FEET. SNOW WATER EQUIVALENT IS 1.6 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 32Ene Nash Fork Campgroun, WYBROOKLYN LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10240 FEET. SNOW WATER EQUIVALENT IS 1.6 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 383 Wnw Sugar Loaf Campgr, WYMEDICINE BOW SNOTEL IN THE SNOWY RANGE. ELEVATION 10500 FEET. SNOW WATER EQUIVALENT IS 1.9 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.
Dec 28, 6:00 AM MSTHEAVY SNOW 428 Ene Hog Park Campgrou, WYBLACKHALL MOUNTAIN SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 9820 FEET. SNOW WATER EQUIVALENT IS 2.1 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 20 TO 1. ACCUMULATION WAS OVER PAST 55 HOURS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 7.8 hours before the alert went out and 230 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Riverton, WY at 12:00Z on 2021-12-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2021-12-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1942 m above ground
0-6 km bulk shear
98 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

718 
WWUS45 KCYS 251950
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
1250 PM MST Sat Dec 25 2021

...HEAVY SNOW EXPECTED FOR THE MOUNTAINS TONIGHT THROUGH MONDAY...

WYZ112-114-261200-
/O.UPG.KCYS.WS.A.0015.211226T0600Z-211227T1200Z/
/O.NEW.KCYS.WS.W.0020.211226T0600Z-211228T0000Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
1250 PM MST Sat Dec 25 2021

...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 PM
MST MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 18
  inches. Winds gusting as high as 60 mph.

* WHERE...Sierra MAdre and Snowy Range to include Centennial and
  Albany.

* WHEN...From 11 PM this evening to 5 PM MST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas of 
  blowing snow could significantly reduce visibility. Hikers and 
  snow mobilers likely to become disoriented and lost with very 
  poor visibility in heavy snow and blowing snow. The cold wind 
  chills as low as 25 below zero could cause frostbite on exposed 
  skin in as little as 30 minutes.

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.

&&

$$
7 follow-up statements
375 
WWUS45 KCYS 252105
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
205 PM MST Sat Dec 25 2021

...HEAVY SNOW EXPECTED FOR THE MOUNTAINS TONIGHT THROUGH MONDAY...

WYZ112-114-261200-
/O.CON.KCYS.WS.W.0020.211226T0600Z-211228T0000Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
205 PM MST Sat Dec 25 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 5 PM MST MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 
  18 inches. Winds gusting as high as 60 mph.

* WHERE...Sierra Madre and Snowy Range to include Centennial and 
  Albany.

* WHEN...From 11 PM this evening to 5 PM MST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility. Hikers 
  and snow mobilers likely to become disoriented and lost with 
  very poor visibility in heavy snow and blowing snow. The cold 
  wind chills as low as 25 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$
369 
WWUS45 KCYS 261038
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
338 AM MST Sun Dec 26 2021

...HEAVY SNOW EXPECTED FOR THE MOUNTAINS TONIGHT THROUGH MONDAY...

WYZ112-114-261845-
/O.CON.KCYS.WS.W.0020.000000T0000Z-211228T0000Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
338 AM MST Sun Dec 26 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 
  18 inches. Winds gusting as high as 60 mph.

* WHERE...Sierra Madre and Snowy Range to include Centennial and 
  Albany.

* WHEN...From 11 PM this evening to 5 PM MST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility. Hikers 
  and snow mobilers likely to become disoriented and lost with 
  very poor visibility in heavy snow and blowing snow. The cold 
  wind chills as low as 25 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$
152 
WWUS45 KCYS 262050
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
150 PM MST Sun Dec 26 2021

...HEAVY SNOW EXPECTED FOR THE MOUNTAINS THROUGH MONDAY...

WYZ112-114-271200-
/O.CON.KCYS.WS.W.0020.000000T0000Z-211228T0000Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
150 PM MST Sun Dec 26 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 
  18 inches. Winds gusting as high as 60 mph.

* WHERE...Sierra Madre and Snowy Range to include Centennial and 
  Albany.

* WHEN...Through 5 PM MST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility. Hikers 
  and snow mobilers likely to become disoriented and lost with 
  very poor visibility in heavy snow and blowing snow. The cold 
  wind chills as low as 25 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$
988 
WWUS45 KCYS 271039
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
339 AM MST Mon Dec 27 2021

...HEAVY SNOW EXPECTED TO CONTINUE FOR THE MOUNTAINS THROUGH 
MONDAY NIGHT...

WYZ112-114-271845-
/O.EXT.KCYS.WS.W.0020.000000T0000Z-211228T1500Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
339 AM MST Mon Dec 27 2021

...WINTER STORM WARNING EXTENDED UNTIL 8 AM MST TUESDAY...

* WHAT...Heavy snow expected. Additional accumulation of 6 to 12
  inches for a storm total of 1 to 3 feet. Winds gusting as high 
  as 50 mph.

* WHERE...Sierra Madre and Snowy Range to include Centennial and 
  Albany.

* WHEN...Until 8 AM MST Tuesday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility. Hikers 
  and snow mobilers likely to become disoriented and lost with 
  very poor visibility in heavy snow and blowing snow. The cold 
  wind chills as low as 25 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$
750 
WWUS45 KCYS 271945
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
1245 PM MST Mon Dec 27 2021

...HEAVY SNOW EXPECTED TO CONTINUE FOR THE MOUNTAINS THROUGH
TUESDAY MORNING...

WYZ112-114-281200-
/O.CON.KCYS.WS.W.0020.000000T0000Z-211228T1500Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
1245 PM MST Mon Dec 27 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM MST
TUESDAY...

* WHAT...Heavy snow expected. Additional accumulation of 6 to 12 
  inches for a storm total of 1 to 3 feet. Winds gusting as high 
  as 50 mph.

* WHERE...Sierra Madre and Snowy Range to include Centennial and 
  Albany.

* WHEN...Until 8 AM MST Tuesday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility. Hikers 
  and snow mobilers likely to become disoriented and lost with 
  very poor visibility in heavy snow and blowing snow. The cold 
  wind chills as low as 25 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$
118 
WWUS45 KCYS 281022
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
322 AM MST Tue Dec 28 2021

...HEAVY SNOW EXPECTED TO CONTINUE FOR THE MOUNTAINS THROUGH
TUESDAY MORNING...

WYZ112-114-281500-
/O.CON.KCYS.WS.W.0020.000000T0000Z-211228T1500Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
322 AM MST Tue Dec 28 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* WHAT...Heavy snow expected. Storm total snow accumulations of 1
  to 3 feet since Sunday morning. Winds gusting as high as 50 
  mph.

* WHERE...Sierra Madre and Snowy Range to include Centennial and 
  Albany.

* WHEN...Until 8 AM MST Tuesday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility. Hikers 
  and snow mobilers likely to become disoriented and lost with 
  very poor visibility in heavy snow and blowing snow. The cold 
  wind chills as low as 25 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$
879 
WWUS45 KCYS 281458
WSWCYS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
758 AM MST Tue Dec 28 2021

WYZ112-114-281600-
/O.EXP.KCYS.WS.W.0020.000000T0000Z-211228T1500Z/
Sierra Madre Range-Snowy Range-
Including the cities of Centennial and Albany
758 AM MST Tue Dec 28 2021

...WINTER STORM WARNING WILL EXPIRE AT 8 AM MST THIS MORNING...

Light snow will continue on and off through the day...but heavy
snow is no longer expected. Therefore...the Winter Storm Warning 
will expire at 8 AM this morning.

$$

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 25, 2:42 AM MSTWinter Weather AdvisoryCYSAlbany, Laramie8 hr
Dec 25, 3:54 AM MSTWinter Storm WatchCYSAlbany, Carbon9 hr
Dec 25, 3:55 AM MSTHigh Wind WatchCYSAlbany, Carbon, Laramie, Platte9 hr
Dec 25, 1:04 PM MSTHigh Wind WatchCYSGoshen, Laramie, Niobrara15 hr
Dec 25, 1:04 PM MSTHigh Wind WarningCYSAlbany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more39 hr

Nearby

Winter Storm Warnings in Wyoming, 2021Every winter storm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.