Alert archive / Wyoming / Snow Squall Warnings in 2021
Snow Squall Warning 7, NWS Cheyenne, WY
NWS Cheyenne, WY issued this snow squall warning at Feb 3, 2021, 12:31 PM MST for Albany County, Carbon County, Wyoming. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Feb 3, 2021, 12:31 PM MST (19:31 UTC)
- Expired
- Feb 3, 2021, 1:30 PM MST
- In force
- 59 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Albany County, WY, Carbon County, WY
The radar
The Cheyenne radar (KCYS), 105 km from the middle of the area, began a volume at 19:32 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 12:00Z, 7.5 hours before the alert went out and 266 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
- 1710 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 221 m²/s²
- 0-3 km storm-relative helicity
- 298 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
429
WWUS55 KCYS 031932
SQWCYS
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Cheyenne WY
1231 PM MST Wed Feb 3 2021
WYC001-007-032030-
/O.NEW.KCYS.SQ.W.0007.210203T1931Z-210203T2030Z/
Carbon WY-Albany WY-
1231 PM MST Wed Feb 3 2021
The National Weather Service in Cheyenne has issued a
* Snow Squall Warning for...
East central Carbon County in south central Wyoming...
Central Albany County in southeastern Wyoming...
* Until 130 PM MST.
* At 1231 PM MST, a dangerous snow squall was located 11 miles
northeast of North Fork Campground, or 25 miles northwest of
Laramie, moving northeast at 35 mph.
HAZARD...Extremely poor visibility in snow and blowing snow. Wind
gusts greater than 30 mph.
SOURCE...Radar and webcams.
IMPACT...Dangerous life-threatening travel.
This includes Interstate 80 in Wyoming between mile markers 280 and
292.
This snow squall will remain over mainly rural areas of east central
Carbon and central Albany Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
There is no safe place on a highway when a snow squall hits.
Visibility and traction are immediately lost in whiteout conditions,
making it difficult or impossible to slow down and avoid stopped
vehicles. Delay travel or safely exit the highway before the snow
squall arrives.
&&
LAT...LON 4141 10594 4154 10612 4156 10608 4144 10589
TIME...MOT...LOC 1931Z 233DEG 30KT 4148 10602
$$
CoxThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 3, 12:14 PM MST | Snow Squall Warning | CYS | Carbon | 49 min |
| Feb 3, 12:46 PM MST | Snow Squall Warning | CYS | Carbon | 59 min |
| Feb 3, 1:30 PM MST | Snow Squall Warning | CYS | Albany, Carbon | 45 min |
| Feb 3, 1:30 PM MST | Snow Squall Warning | CYS | Albany, Carbon | 45 min |
| Feb 3, 2:15 PM MST | Snow Squall Warning | CYS | Albany, Carbon | 60 min |
| Feb 3, 3:00 PM MST | Snow Squall Warning | CYS | Albany | 45 min |
| Feb 3, 3:41 PM MST | Snow Squall Warning | CYS | Albany | 49 min |
Nearby
Snow Squall Warnings in Wyoming, 2021Every snow squall 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.