Alert archive / Utah / Snow Squall Warnings in 2021
Snow Squall Warning 7, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this snow squall warning at Dec 27, 2021, 4:31 PM MST for Davis County, Tooele County, Utah. It was in force for 44 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 27, 2021, 4:31 PM MST (23:31 UTC)
- Expired
- Dec 27, 2021, 5:15 PM MST
- In force
- 44 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
Counties Davis County, UT, Tooele County, UT
The radar
The Salt Lake City radar (KMTX), 56 km from the middle of the area, began a volume at 23:31 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 27, 5:15 PM MST | NON-TSTM WND GST 68 | Marshall, UT | TOOELE 2 - 4318 FT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 11.5 hours before the alert went out and 47 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
- 1580 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 271 m²/s²
- 0-3 km storm-relative helicity
- 293 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
670
WWUS55 KSLC 272331
SQWSLC
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Salt Lake City UT
431 PM MST Mon Dec 27 2021
UTC011-045-280015-
/O.NEW.KSLC.SQ.W.0007.211227T2331Z-211228T0015Z/
Davis UT-Tooele UT-
431 PM MST Mon Dec 27 2021
The National Weather Service in Salt Lake City has issued a
* Snow Squall Warning for...
Southwestern Davis County in northern Utah...
Northeastern Tooele County in northern Utah...
* Until 515 PM MST
* At 430 PM MST, a dangerous snow squall was located along a line
extending from 7 miles southwest of Great Salt Lake South of the
Causeway to 10 miles southeast of Clive, moving southeast at 30
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 Utah between mile markers 73 and 99.
Locations impacted include...
Tooele, Grantsville, Stansbury Park, Tooele Army Depot, Skull Valley,
Great Salt Lake South of the Causeway, Lake Point and Erda.
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 4092 11245 4092 11225 4073 11225 4051 11228
4053 11308
TIME...MOT...LOC 2330Z 298DEG 24KT 4091 11247 4056 11296
$$
MPS2 follow-up statements
940
WWUS55 KSLC 272347
SQWSLC
Snow Squall Warning
National Weather Service Salt Lake City UT
447 PM MST Mon Dec 27 2021
UTC011-045-280015-
/O.CON.KSLC.SQ.W.0007.000000T0000Z-211228T0015Z/
Davis UT-Tooele UT-
447 PM MST Mon Dec 27 2021
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
SOUTHWESTERN DAVIS AND NORTHEASTERN TOOELE COUNTIES...
At 446 PM MST, a dangerous snow squall was located along a line
extending from 9 miles south of Great Salt Lake South of the Causeway
to 6 miles northwest of Skull Valley, moving southeast at 30 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Wind gusts greater than 30 mph.
SOURCE...Radar indicated.
IMPACT...Rapid snow accumulation on area roadways resulting in
dangerous travel.
This includes Interstate 80 in Utah between mile markers 73 and 99.
Locations impacted include...
Tooele, Grantsville, Stansbury Park, Tooele Army Depot, Skull Valley,
Great Salt Lake South of the Causeway, Lake Point and Erda.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4092 11245 4092 11225 4073 11225 4051 11228
4053 11308
TIME...MOT...LOC 2346Z 298DEG 24KT 4086 11236 4051 11285
$$
MPS200
WWUS55 KSLC 280018
SQWSLC
Snow Squall Warning
National Weather Service Salt Lake City UT
518 PM MST Mon Dec 27 2021
UTC011-045-280028-
/O.EXP.KSLC.SQ.W.0007.000000T0000Z-211228T0015Z/
Davis UT-Tooele UT-
518 PM MST Mon Dec 27 2021
...THE SNOW SQUALL WARNING FOR SOUTHWESTERN DAVIS AND NORTHEASTERN
TOOELE COUNTIES HAS EXPIRED...
Moderate to heavy snowfall will into the early evening hours across
the area resulting in snow covered roads. A Winter Weather Advisory
remains in effect for the area through 4 AM Tuesday.
LAT...LON 4092 11245 4092 11225 4073 11225 4051 11228
4053 11308
TIME...MOT...LOC 0018Z 298DEG 24KT 4078 11216 4042 11266
$$
MPSThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 27, 4:02 AM MST | Winter Storm Warning | SLC | Box Elder, Cache, Davis, Duchesne, Iron, Juab and 9 more | 31 hr |
| Dec 27, 4:01 PM MST | Snow Squall Warning | SLC | Box Elder, Cache, Davis, Morgan, Weber | 29 min |
| Dec 27, 4:27 PM MST | Snow Squall Warning | SLC | Box Elder, Davis, Morgan, Tooele, Weber | 48 min |
| Dec 27, 4:51 PM MST | Snow Squall Warning | SLC | Davis, Morgan, Salt Lake, Tooele | 54 min |
Nearby
Snow Squall Warnings in Utah, 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.