Alert archive / Wyoming / Snow Squall Warnings in 2021
Snow Squall Warning 18, NWS Cheyenne, WY
NWS Cheyenne, WY issued this snow squall warning at Dec 26, 2021, 1:40 PM MST for Albany County, Laramie County, Wyoming. It was in force for 50 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Dec 26, 2021, 1:40 PM MST (20:40 UTC)
- Expired
- Dec 26, 2021, 2:30 PM MST
- In force
- 50 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Albany County, WY, Laramie County, WY
The radar
The Cheyenne radar (KCYS), 65 km from the middle of the area, began a volume at 20:45 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 |
|---|---|---|---|
| Dec 26, 2:06 PM MST | NON-TSTM WND GST 62 | 4 W Laramie, WY | ASOS STATION KLAR LARAMIE AIRPORT - LAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 8.7 hours before the alert went out and 250 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
- 2209 m above ground
- 0-6 km bulk shear
- 131 kt
- 0-1 km storm-relative helicity
- 376 m²/s²
- 0-3 km storm-relative helicity
- 339 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
583
WWUS55 KCYS 262040
SQWCYS
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Cheyenne WY
140 PM MST Sun Dec 26 2021
WYC001-021-262130-
/O.NEW.KCYS.SQ.W.0018.211226T2040Z-211226T2130Z/
Albany WY-Laramie WY-
140 PM MST Sun Dec 26 2021
The National Weather Service in Cheyenne has issued a
* Snow Squall Warning for...
Southeastern Albany County in southeastern Wyoming...
Southwestern Laramie County in southeastern Wyoming...
* Until 230 PM MST.
* At 140 PM MST, a dangerous snow squall was located near Laramie,
moving southeast at 40 mph.
HAZARD...Whiteout conditions. Zero visibility in heavy snow and
blowing snow. Wind gusts greater than 60 mph.
SOURCE...Radar indicated.
IMPACT...Dangerous life-threatening travel.
*
This includes Interstate 80 in Wyoming between mile markers 288 and
352.
Locations impacted include...
Laramie, Tie City Campground, Vedauwoo, Tie Siding, University Of
Wyoming War Memorial Stadium, Crystal Lake Reservoir, Pumpkin Vine,
Crystal Lake Campground, Vedauwoo Campground, Buford, North Crow
Campground, Granite Springs Reservoir, Granite Springs Campground,
The Buttes and Yellow Pine Campground.
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.
&&
LAT...LON 4137 10603 4156 10594 4115 10494 4099 10508
4100 10543
TIME...MOT...LOC 2040Z 304DEG 43KT 4127 10562
$$
ClaycombThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 26, 11:55 AM MST | Snow Squall Warning | CYS | Carbon | 50 min |
| Dec 26, 12:54 PM MST | Snow Squall Warning | CYS | Albany, Carbon | 51 min |
| Dec 26, 2:29 PM MST | Snow Squall Warning | CYS | Albany, Laramie | 46 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.