Alert archive / Utah / Snow Squall Warnings in 2021
Snow Squall Warning 6, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this snow squall warning at Dec 27, 2021, 4:27 PM MST for 5 counties in Utah. It was in force for 48 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, 4:27 PM MST (23:27 UTC)
- Expired
- Dec 27, 2021, 5:15 PM MST
- In force
- 48 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
Counties Box Elder County, UT, Davis County, UT, Morgan County, UT, Tooele County, UT, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 43 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, 4:50 PM MST | NON-TSTM WND GST 46 | Uintah, UT | WEBER CANYON POWER PLANT - 5801 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 45 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.
283
WWUS55 KSLC 272327
SQWSLC
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Salt Lake City UT
427 PM MST Mon Dec 27 2021
UTC003-011-029-045-057-280015-
/O.NEW.KSLC.SQ.W.0006.211227T2327Z-211228T0015Z/
Weber UT-Box Elder UT-Davis UT-Morgan UT-Tooele UT-
427 PM MST Mon Dec 27 2021
The National Weather Service in Salt Lake City has issued a
* Snow Squall Warning for...
Central Weber County in northern Utah...
Eastern Box Elder County in northern Utah...
Davis County in northern Utah...
West central Morgan County in northern Utah...
Northeastern Tooele County in northern Utah...
* Until 515 PM MST
* At 426 PM MST, a dangerous snow squall was located along a line
extending from North Ogden to near Great Salt Lake South of the
Causeway, 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 the following highways...
Interstate 15 between mile markers 320 and 353.
Interstate 84 between mile markers 82 and 100.
Locations impacted include...
Ogden, Layton, Farmington, Hill Air Force Base, Roy, Clearfield,
Kaysville, Syracuse, Clinton, North Ogden, South Ogden, Centerville,
Washington Terrace, Riverdale, Hooper, South Weber,
Marriott-Slaterville, Uintah, Weber State University and South
Willard.
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 4136 11172 4093 11171 4092 11246 4136 11208
TIME...MOT...LOC 2326Z 264DEG 38KT 4133 11197 4093 11238
$$
MPS2 follow-up statements
841
WWUS55 KSLC 272343
SQWSLC
Snow Squall Warning
National Weather Service Salt Lake City UT
443 PM MST Mon Dec 27 2021
UTC003-011-029-045-057-280015-
/O.CON.KSLC.SQ.W.0006.000000T0000Z-211228T0015Z/
Weber UT-Box Elder UT-Davis UT-Morgan UT-Tooele UT-
443 PM MST Mon Dec 27 2021
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
CENTRAL WEBER...EASTERN BOX ELDER...DAVIS...WEST CENTRAL MORGAN AND
NORTHEASTERN TOOELE COUNTIES...
At 443 PM MST, a dangerous snow squall was located along a line
extending from 8 miles east of North Ogden to 11 miles southeast of
Great Salt Lake South of the Causeway, moving east at 45 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Wind gusts greater than 30 mph.
SOURCE...Radar indicated.
IMPACT...Rapid snow accumulation on area roadways resulting in
dangerous travel.
This includes the following highways...
Interstate 15 between mile markers 320 and 353.
Interstate 84 between mile markers 82 and 100.
Locations impacted include...
Ogden, Layton, Farmington, Hill Air Force Base, Roy, Clearfield,
Kaysville, Syracuse, Clinton, North Ogden, South Ogden, Centerville,
Washington Terrace, Riverdale, Hooper, South Weber,
Marriott-Slaterville, Uintah, Weber State University and South
Willard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4136 11172 4093 11171 4092 11246 4136 11208
TIME...MOT...LOC 2343Z 264DEG 38KT 4132 11180 4092 11221
$$
MPS277 WWUS55 KSLC 280017 SQWSLC Snow Squall Warning National Weather Service Salt Lake City UT 517 PM MST Mon Dec 27 2021 UTC003-011-029-045-057-280025- /O.EXP.KSLC.SQ.W.0006.000000T0000Z-211228T0015Z/ Weber UT-Box Elder UT-Davis UT-Morgan UT-Tooele UT- 517 PM MST Mon Dec 27 2021 ...THE SNOW SQUALL WARNING FOR CENTRAL WEBER...EASTERN BOX ELDER... DAVIS...WEST CENTRAL MORGAN 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 4136 11172 4093 11171 4092 11246 4136 11208 TIME...MOT...LOC 0015Z 264DEG 38KT 4135 11140 4095 11181 $$ MPS
The 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, 4:31 PM MST | Snow Squall Warning | SLC | Davis, Tooele | 44 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.