Alert archive / Wyoming / Snow Squall Warnings in 2021
Snow Squall Warning 17, NWS Cheyenne, WY
NWS Cheyenne, WY issued this snow squall warning at Dec 26, 2021, 12:54 PM MST for Albany County, Carbon County, Wyoming. It was in force for 51 min. 2 reports 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, 12:54 PM MST (19:54 UTC)
- Expired
- Dec 26, 2021, 1:45 PM MST
- In force
- 51 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Albany County, WY, Carbon County, WY
The radar
The Cheyenne radar (KCYS), 114 km from the middle of the area, began a volume at 19:57 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, 1:16 PM MST | NON-TSTM WND GST 58 | 1 Nnw Arlington, WY | MESONET STATION KARL 0.6 NW ARLINGTON (WYDOT). |
| Dec 26, 1:26 PM MST | NON-TSTM WND GST 58 | 7 Ese Arlington, WY | MESONET STATION WY24 6.9 E ARLINGTON (WYDOT). |
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, 7.9 hours before the alert went out and 258 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
- 1333 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
113
WWUS55 KCYS 261954
SQWCYS
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Cheyenne WY
1254 PM MST Sun Dec 26 2021
WYC001-007-262045-
/O.NEW.KCYS.SQ.W.0017.211226T1954Z-211226T2045Z/
Carbon WY-Albany WY-
1254 PM MST Sun Dec 26 2021
The National Weather Service in Cheyenne has issued a
* Snow Squall Warning for...
East central Carbon County in south central Wyoming...
Southern Albany County in southeastern Wyoming...
* Until 145 PM MST.
* At 1254 PM MST, a dangerous snow squall was located near Elk
Mountain, or 45 miles northwest of Laramie, moving east 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 255 and
322.
Locations impacted include...
Laramie, Elk Mountain, University Of Wyoming War Memorial Stadium,
Lake Hattie Reservoir, The Buttes, Hutton Lake and Arlington.
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 4163 10652 4181 10643 4133 10535 4105 10566
TIME...MOT...LOC 1954Z 310DEG 72KT 4165 10633
$$
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, 1:40 PM MST | Snow Squall Warning | CYS | Albany, Laramie | 50 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.