Alert archive / Utah / Snow Squall Warnings in 2021
Snow Squall Warning 8, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this snow squall warning at Dec 27, 2021, 4:51 PM MST for 4 counties in Utah. It was in force for 54 min. 5 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 27, 2021, 4:51 PM MST (23:51 UTC)
- Expired
- Dec 27, 2021, 5:45 PM MST
- In force
- 54 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
Counties Davis County, UT, Morgan County, UT, Salt Lake County, UT, Tooele County, UT
The radar
The Salt Lake City radar (KMTX), 76 km from the middle of the area, began a volume at 23:50 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, 5:10 PM MST | NON-TSTM WND GST 46 | West Bountiful, UT | LEGACY PARKWAY - 4215 FT |
| Dec 27, 5:14 PM MST | NON-TSTM WND GST 48 | Salt Lake City, UT | SALT LAKE INTL AIRPORT - 4226 FT |
| Dec 27, 5:22 PM MST | NON-TSTM WND GST 51 | Salt Lake City, UT | UNIVERSITY OF UTAH - 4806 FT |
| Dec 27, 5:30 PM MST | NON-TSTM WND GST 46 | West Valley City, UT | BACCUS HIGHWAY - 5172 FT |
| Dec 27, 5:50 PM MST | NON-TSTM WND GST 60 | Brighton, UT | REYNOLDS PEAK - 9400 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, 11.9 hours before the alert went out and 11 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.
750
WWUS55 KSLC 272351
SQWSLC
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Salt Lake City UT
451 PM MST Mon Dec 27 2021
UTC011-029-035-045-280045-
/O.NEW.KSLC.SQ.W.0008.211227T2351Z-211228T0045Z/
Salt Lake UT-Davis UT-Morgan UT-Tooele UT-
451 PM MST Mon Dec 27 2021
The National Weather Service in Salt Lake City has issued a
* Snow Squall Warning for...
Salt Lake County in northern Utah...
Southeastern Davis County in northern Utah...
Southwestern Morgan County in northern Utah...
Eastern Tooele County in northern Utah...
* Until 545 PM MST
* At 450 PM MST, a dangerous snow squall was located along a line
extending from 6 miles south of Syracuse to near Grantsville,
moving east at 35 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Wind gusts greater than 40 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 288 and 319.
Interstate 80 in Utah between mile markers 98 and 138.
Locations impacted include...
Salt Lake City, West Valley City, Sandy, Murray, Bountiful, Tooele,
West Jordan, Taylorsville, South Jordan, Draper, Riverton, Cottonwood
Heights, Midvale, Holladay, South Salt Lake, Herriman, North Salt
Lake, Centerville, Woods Cross and Bluffdale.
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 4093 11170 4059 11157 4047 11191 4047 11217
4052 11230 4092 11226
TIME...MOT...LOC 2350Z 283DEG 29KT 4100 11205 4065 11255
$$
MPS2 follow-up statements
393
WWUS55 KSLC 280015
SQWSLC
Snow Squall Warning
National Weather Service Salt Lake City UT
515 PM MST Mon Dec 27 2021
UTC011-029-035-045-280045-
/O.CON.KSLC.SQ.W.0008.000000T0000Z-211228T0045Z/
Salt Lake UT-Davis UT-Morgan UT-Tooele UT-
515 PM MST Mon Dec 27 2021
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 545 PM MST FOR SALT
LAKE...SOUTHEASTERN DAVIS...SOUTHWESTERN MORGAN AND EASTERN TOOELE
COUNTIES...
At 514 PM MST, a dangerous snow squall was located along a line
extending from near Bountiful to near Stansbury Park, moving east at
35 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Wind gusts greater than 40 mph.
SOURCE...Radar indicated.
IMPACT...Rapid snow accumulation on area roadways resulting in
dangerous travel.
This includes the following highways...
Interstate 15 between mile markers 288 and 319.
Interstate 80 in Utah between mile markers 98 and 138.
Locations impacted include...
Salt Lake City, West Valley City, Sandy, Murray, Bountiful, Tooele,
West Jordan, Taylorsville, South Jordan, Draper, Riverton, Cottonwood
Heights, Midvale, Holladay, South Salt Lake, Herriman, North Salt
Lake, Centerville, Woods Cross and Bluffdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4093 11170 4059 11157 4047 11191 4047 11217
4052 11230 4092 11226
TIME...MOT...LOC 0014Z 284DEG 30KT 4086 11177 4061 11233
$$
MPS205
WWUS55 KSLC 280033
SQWSLC
Snow Squall Warning
National Weather Service Salt Lake City UT
533 PM MST Mon Dec 27 2021
UTC011-029-035-045-280045-
/O.CON.KSLC.SQ.W.0008.000000T0000Z-211228T0045Z/
Salt Lake UT-Davis UT-Morgan UT-Tooele UT-
533 PM MST Mon Dec 27 2021
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 545 PM MST FOR SALT
LAKE...SOUTHEASTERN DAVIS...SOUTHWESTERN MORGAN AND EASTERN TOOELE
COUNTIES...
At 532 PM MST, a dangerous snow squall was located along a line
extending from near East Canyon State Park to near Bingham Canyon
Mine, moving east at 35 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Wind gusts greater than 40 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 288 and 319.
Interstate 80 in Utah between mile markers 98 and 138.
Locations impacted include...
Salt Lake City, West Valley City, Sandy, Murray, Bountiful, Tooele,
West Jordan, Taylorsville, South Jordan, Draper, Riverton, Cottonwood
Heights, Midvale, Holladay, South Salt Lake, Herriman, North Salt
Lake, Centerville, Woods Cross and Bluffdale.
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 4093 11170 4059 11157 4047 11191 4047 11217
4052 11230 4092 11226
TIME...MOT...LOC 0032Z 283DEG 30KT 4084 11165 4052 11216
$$
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, 4:31 PM MST | Snow Squall Warning | SLC | Davis, Tooele | 44 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.