Alert archive / Wyoming / Snow Squall Warnings in 2021
Snow Squall Warning 10, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this snow squall warning at Dec 27, 2021, 5:24 PM MST for Uinta County, Wyoming. It was in force for 66 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
- Dec 27, 2021, 5:24 PM MST (00:24 UTC)
- Expired
- Dec 27, 2021, 6:30 PM MST
- In force
- 66 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
County Uinta County, WY
The radar
The Salt Lake City radar (KMTX), 167 km from the middle of the area, began a volume at 00:25 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
Salt Lake City I, UT (KSLC), launched 00:00Z, 0.4 hours before the alert went out and 132 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
- 33 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1606 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 219 m²/s²
- 0-3 km storm-relative helicity
- 252 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
924
WWUS55 KSLC 280024
SQWSLC
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Salt Lake City UT
524 PM MST Mon Dec 27 2021
WYC041-280130-
/O.NEW.KSLC.SQ.W.0010.211228T0024Z-211228T0130Z/
Uinta WY-
524 PM MST Mon Dec 27 2021
The National Weather Service in Salt Lake City has issued a
* Snow Squall Warning for...
Uinta County in southwestern Wyoming...
* Until 630 PM MST
* At 523 PM MST, a dangerous snow squall was located along a line
extending from 9 miles south of Woodruff to near Morgan, moving
east at 45 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Wind gusts greater than 30 mph.
SOURCE...Radar indicated.
IMPACT...Rapid snow accumulation on area roadways resulting in
dangerous travel.
* This includes Interstate 80 in Wyoming between mile markers 1 and
56.
Locations impacted include...
Evanston, Lyman, Robertson, Mountain View, Lonetree, Millburne, Fort
Bridger, Almy, Altamont, Carter, Ragen, Church Buttes, Piedmont and
Leroy.
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.
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4100 11005 4100 11104 4157 11104 4158 11005
TIME...MOT...LOC 0023Z 260DEG 41KT 4140 11121 4100 11163
$$
MPS1 follow-up statement
288
WWUS55 KSLC 280106
SQWSLC
Snow Squall Warning
National Weather Service Salt Lake City UT
606 PM MST Mon Dec 27 2021
WYC041-280130-
/O.CON.KSLC.SQ.W.0010.000000T0000Z-211228T0130Z/
Uinta WY-
606 PM MST Mon Dec 27 2021
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 630 PM MST FOR UINTA
COUNTY...
At 606 PM MST, a dangerous snow squall was located along a line
extending from 17 miles south of Elkol to 14 miles south of Evanston,
moving east at 45 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Wind gusts greater than 30 mph.
SOURCE...Radar indicated.
IMPACT...Rapid snow accumulation on area roadways resulting in
dangerous travel.
This includes Interstate 80 in Wyoming between mile markers 1 and 56.
Locations impacted include...
Evanston, Lyman, Robertson, Mountain View, Lonetree, Millburne, Fort
Bridger, Almy, Altamont, Carter, Ragen, Church Buttes, Piedmont and
Leroy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4100 11005 4100 11104 4157 11104 4158 11005
TIME...MOT...LOC 0106Z 260DEG 41KT 4147 11064 4107 11107
$$
MPSThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 27, 5:02 PM MST | Snow Squall Warning | SLC | Uinta | 43 min |
| Dec 28, 3:42 PM MST | Winter Weather Advisory | SLC | Uinta | 4 days |
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.