Alert archive / Wyoming / Winter Storm Warnings in 2021
Winter Storm Warning 13, NWS Cheyenne, WY
NWS Cheyenne, WY issued this winter storm warning at Apr 27, 2021, 2:34 AM MDT for Albany County, Carbon County, Wyoming. It took effect at Apr 27, 2021, 12:00 PM MDT. It was in force for 18 hr. 8 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
- Apr 27, 2021, 2:34 AM MDT (08:34 UTC)
- In effect from
- Apr 27, 2021, 12:00 PM MDT
- Expired
- Apr 28, 2021, 6:00 AM MDT
- In force
- 18 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 08:33 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 28, 3:00 AM MDT | SNOW 4 | 2 Nw Jack Creek Campgro, WY | DIVIDE PEAK SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 8880 FEET. SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 10 TO 1. ACCUMULATION WAS OVER PAST 15 HOURS. |
| Apr 28, 3:00 AM MDT | SNOW 4 | 2 Se Yellow Pine Campgr, WY | CROW CREEK SNOTEL IN THE LARAMIE RANGE. ELEVATION 8330 FEET. SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 10 TO 1. ACCUMULATION WAS OVER PAST 15 HOURS. |
| Apr 28, 3:00 AM MDT | SNOW 4.8 | W Deep Creek Campground, WY | SAND LAKE SNOTEL IN THE SNOWY RANGE. ELEVATION 10050 FEET. SNOW WATER EQUIVALENT IS 0.4 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 12 TO 1. ACCUMULATION WAS OVER PAST 15 HOURS. |
| Apr 28, 3:00 AM MDT | SNOW 6 | 3 Wnw Sugar Loaf Campgr, WY | MEDICINE BOW SNOTEL IN THE SNOWY RANGE. ELEVATION 10500 FEET. SNOW WATER EQUIVALENT IS 0.5 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 12 TO 1. ACCUMULATION WAS OVER PAST 15 HOURS. |
| Apr 28, 3:00 AM MDT | SNOW 6 | 5 Wsw Sugar Loaf Campgr, WY | NORTH 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 12 TO 1. ACCUMULATION WAS OVER PAST 15 HOURS. |
| Apr 28, 3:00 AM MDT | SNOW 7 | 2 E Battle Lake, WY | OLD 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 10 TO 1. ACCUMULATION WAS OVER PAST 15 HOURS. |
| Apr 28, 3:00 AM MDT | SNOW 9 | 8 Ene Hog Park Campgrou, WY | BLACKHALL MOUNTAIN SNOTEL IN THE SIERRA MADRE RANGE. ELEVATION 9820 FEET. SNOW WATER EQUIVALENT IS 0.9 INCHES AND THE SNOW TO LIQUID RATIO USED WAS 10 TO 1. ACCUMULATION WAS OVER PAST 15 HOURS. |
| Apr 28, 3:00 AM MDT | SNOW 10 | 2 Wsw Bottle Creek Camp, WY | WEBBER 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 10 TO 1. ACCUMULATION WAS OVER PAST 15 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 00:00Z, 8.6 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.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 1570 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
687 WWUS45 KCYS 270834 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 234 AM MDT Tue Apr 27 2021 ...ACCUMULATING SNOW LIKELY FOR THE SOUTHEAST WYOMING MOUNTAINS THIS AFTERNOON THROUGH LATE TONIGHT... WYZ114-272200- /O.UPG.KCYS.WS.A.0007.210428T0000Z-210428T1500Z/ /O.NEW.KCYS.WS.W.0013.210427T1800Z-210428T1200Z/ Snowy Range- Including the cities of Centennial and Albany 234 AM MDT Tue Apr 27 2021 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO 6 AM MDT WEDNESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 7 to 14 inches, heaviest above 9500 feet. * WHERE...Snowy Range including Albany and Centennial. * WHEN...From noon today to 6 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the evening commute. Heavy mountain snow could lead to hikers and outdoor enthusiasts becoming disoriented. 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. && $$ WYZ116-272200- /O.UPG.KCYS.WS.A.0007.210428T0000Z-210428T1500Z/ /O.NEW.KCYS.WW.Y.0030.210427T1800Z-210428T1200Z/ South Laramie Range- Including the cities of Buford, Pumpkin Vine, and Vedauwoo 234 AM MDT Tue Apr 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 6 AM MDT WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches. * WHERE...South Laramie Range including Buford, Vedauwoo and the Interstate 80 Summit. * WHEN...From noon today to 6 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ112-272200- /O.NEW.KCYS.WW.Y.0030.210427T1800Z-210428T1200Z/ Sierra Madre Range- 234 AM MDT Tue Apr 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 6 AM MDT WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches. * WHERE...Sierra Madre Range. * WHEN...From noon today to 6 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the 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. && $$
2 follow-up statements
079 WWUS45 KCYS 272125 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 325 PM MDT Tue Apr 27 2021 ...ACCUMULATING SNOW LIKELY FOR THE SOUTHEAST WYOMING MOUNTAINS THIS AFTERNOON THROUGH LATE TONIGHT... WYZ114-281100- /O.CON.KCYS.WS.W.0013.000000T0000Z-210428T1200Z/ Snowy Range- Including the cities of Centennial and Albany 325 PM MDT Tue Apr 27 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT WEDNESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 7 to 14 inches, heaviest above 9500 feet. * WHERE...Snowy Range including Albany and Centennial. * WHEN...From noon today to 6 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the evening commute. Heavy mountain snow could lead to hikers and outdoor enthusiasts becoming disoriented. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ112-116-281100- /O.CON.KCYS.WW.Y.0030.000000T0000Z-210428T1200Z/ Sierra Madre Range-South Laramie Range- Including the cities of Buford, Pumpkin Vine, and Vedauwoo 325 PM MDT Tue Apr 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches. * WHERE...South Laramie Range including Buford, Vedauwoo and the Interstate 80 Summit. * WHEN...From noon today to 6 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the 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. && $$
812 WWUS45 KCYS 280326 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 926 PM MDT Tue Apr 27 2021 ...ACCUMULATING SNOW LIKELY FOR THE SOUTHEAST WYOMING MOUNTAINS AND FOOTHILLS THROUGH LATE TONIGHT... WYZ114-281130- /O.CON.KCYS.WS.W.0013.000000T0000Z-210428T1200Z/ Snowy Range- Including the cities of Centennial and Albany 926 PM MDT Tue Apr 27 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT WEDNESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 7 to 14 inches, heaviest above 9500 feet. * WHERE...Snowy Range including Albany and Centennial. * WHEN...From noon today to 6 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the evening commute. Heavy mountain snow could lead to hikers and outdoor enthusiasts becoming disoriented. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ117-281130- /O.EXA.KCYS.WW.Y.0030.000000T0000Z-210428T1200Z/ South Laramie Range Foothills- Including the cities of Whitaker, Federal, and Horse Creek 926 PM MDT Tue Apr 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM MDT WEDNESDAY... * WHAT...Wet snow. Total snow accumulation of 1 to 3 inches, mainly above 6500 feet. * WHERE...Southern Laramie Range Foothills. * WHEN...From noon today to 6 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions due to slushy and partially snow covered roads. 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. && $$ WYZ112-116-281130- /O.CON.KCYS.WW.Y.0030.000000T0000Z-210428T1200Z/ Sierra Madre Range-South Laramie Range- Including the cities of Buford, Pumpkin Vine, and Vedauwoo 926 PM MDT Tue Apr 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT WEDNESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches. * WHERE...South Laramie Range including Buford, Vedauwoo and the Interstate 80 Summit. * WHEN...From noon today to 6 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 2:34 AM MDT | Winter Weather Advisory | CYS | Albany, Carbon, Laramie | 27 hr |
| Apr 27, 2:00 PM MDT | Special Weather Statement | CYS | Albany | 30 min |
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.