Alert archive / Wyoming / Winter Storm Watches in 2021
Winter Storm Watch 13, NWS Cheyenne, WY
NWS Cheyenne, WY issued this winter storm watch at Dec 22, 2021, 2:36 AM MST for Albany County, Carbon County, Wyoming. It took effect at Dec 23, 2021, 3:00 PM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 22, 2021, 2:36 AM MST (09:36 UTC)
- In effect from
- Dec 23, 2021, 3:00 PM MST
- Expired
- Dec 22, 2021, 1:55 PM MST
- In force
- 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 09:38 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.
The nearest sounding before it
Riverton, WY (KRIW), launched 00:00Z, 9.6 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2779 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
682 WWUS45 KCYS 220936 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 236 AM MST Wed Dec 22 2021 ...HEAVY SNOW EXPECTED FOR THE MOUNTAINS THURSDAY THROUGH EARLY THIS WEEKEND... WYZ112-114-222315- /O.NEW.KCYS.WS.A.0013.211223T2200Z-211225T1800Z/ Sierra Madre Range-Snowy Range- Including the cities of Centennial and Albany 236 AM MST Wed Dec 22 2021 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH SATURDAY MORNING... * WHAT...Heavy snow and blowing snow likely. Total snow accumulations of 1 to 3 feet possible late Thursday afternoon through Saturday morning. Winds could gust as high as 60 mph. * WHERE...The Sierra Madre Range and the Snowy Range. * WHEN...From Thursday afternoon through Saturday morning. * IMPACTS...Travel could be very difficult to impossible. Blowing snow could significantly reduce visibility and drifting snow. * ADDITIONAL DETAILS...Strong gusty winds may result in significant blowing snow and also very cold wind chill temperatures below zero by Friday night. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ TT
1 follow-up statement
966 WWUS45 KCYS 222055 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 155 PM MST Wed Dec 22 2021 ...HEAVY SNOW EXPECTED FOR THE MOUNTAINS THURSDAY THROUGH EARLY THIS WEEKEND... WYZ112-114-231200- /O.UPG.KCYS.WS.A.0013.211223T2200Z-211225T1800Z/ /O.NEW.KCYS.WS.W.0019.211223T2200Z-211225T1800Z/ Sierra Madre Range-Snowy Range- Including the cities of Centennial and Albany 155 PM MST Wed Dec 22 2021 ...WINTER STORM WARNING IN EFFECT FROM 3 PM THURSDAY TO 11 AM MST SATURDAY... * WHAT...Heavy snow expected. Total snow accumulations of up to 3 feet for the Sierra Madre Range and 2 feet for the Snowy Range. Winds gusting as high as 55 mph. * WHERE...Sierra Madre Range and Snowy Range in southeast Wyoming. * WHEN...From 3 PM Thursday to 11 AM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning or evening commute. Hikers and snow mobilers likely to become disoriented and lost with very poor visibility in heavy snow and blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ111-113-231200- /O.NEW.KCYS.WS.A.0014.211224T0000Z-211224T1800Z/ Southwest Carbon County-Upper North Platte River Basin- Including the cities of Baggs, Saratoga, and Encampment 155 PM MST Wed Dec 22 2021 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY MORNING... * WHAT...Heavy snow possible. Total snow accumulations of 6 to 8 inches possible. Winds could gust as high as 50 mph. * WHERE...Southwest Carbon County to include Dixon...Baggs and Dad. Upper North Platte River Valley to include Saratoga and Encampment. * WHEN...From Thursday afternoon through Friday morning. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning or evening commute. Strong winds could cause very poor visibility in blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ WYZ109-110-231200- /O.NEW.KCYS.WS.A.0014.211224T0000Z-211225T0000Z/ Central Carbon County-North Snowy Range Foothills- Including the cities of Rawlins, Arlington, and Elk Mountain 155 PM MST Wed Dec 22 2021 ...WINTER STORM WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY AFTERNOON... * WHAT...Blizzard conditions possible. Total snow accumulations of 5 to 8 inches possible. Winds could gust as high as 70 mph. * WHERE...Central Carbon County to include Rawlins and Sinclair. North Snowy Range Foothills to include Arlington and Elk Mountain. * WHEN...From Thursday afternoon through Friday afternoon. * IMPACTS...Travel could be very difficult. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning or evening commute. Near zero visibility in snow and blowing snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for possible blizzard conditions. Continue to monitor the latest forecasts for updates on this situation. && $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 21, 8:42 PM MST | High Wind Warning | CYS | Laramie | 8 hr |
| Dec 22, 3:43 AM MST | High Wind Watch | CYS | Albany, Carbon, Converse, Laramie, Platte | 26 hr |
| Dec 22, 1:01 PM MST | High Wind Warning | CYS | Albany, Laramie, Platte | 37 hr |
| Dec 22, 1:55 PM MST | Winter Storm Watch | CYS | Albany, Carbon | 16 hr |
| Dec 22, 1:55 PM MST | Winter Storm Warning | CYS | Albany, Carbon | 69 hr |
Nearby
Winter Storm Watches in Wyoming, 2021Every winter storm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.