Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 107, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 10, 2021, 7:16 PM MDT for Davis County, Salt Lake County, Utah. It was in force for 29 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
- Sep 10, 2021, 7:16 PM MDT (01:16 UTC)
- Expired
- Sep 10, 2021, 7:45 PM MDT
- In force
- 29 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Davis County, UT, Salt Lake County, UT
The radar
The Salt Lake City radar (KMTX), 88 km from the middle of the area, began a volume at 01:16 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, 1.3 hours before the alert went out and 22 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
- 430 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 3241 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
The text
As transmitted.
876
WUUS55 KSLC 110116
SVRSLC
UTC011-035-110145-
/O.NEW.KSLC.SV.W.0107.210911T0116Z-210911T0145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
716 PM MDT Fri Sep 10 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
Central Salt Lake County in northern Utah...
Southeastern Davis County in northern Utah...
* Until 745 PM MDT
* At 716 PM MDT, severe thunderstorms were located along a line
extending from West Valley City to Bluffdale, moving northeast at
45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Salt Lake City, West Valley City, Sandy, Murray, Bountiful, West
Jordan, Taylorsville, South Jordan, Draper, Riverton, Cottonwood
Heights, Midvale, Holladay, South Salt Lake, Herriman, North Salt
Lake, Woods Cross, Bluffdale, Millcreek and Kearns.
This includes the following highways...
Interstate 15 between mile markers 286 and 315.
Interstate 80 in Utah between mile markers 113 and 130.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4093 11180 4053 11172 4052 11178 4049 11179
4047 11186 4048 11188 4043 11192 4042 11199
4046 11204 4045 11207 4073 11212 4076 11205
TIME...MOT...LOC 0116Z 211DEG 48KT 4071 11201 4048 11199
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CRK2 follow-up statements
517
WWUS55 KSLC 110131
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
731 PM MDT Fri Sep 10 2021
UTC011-035-110145-
/O.CON.KSLC.SV.W.0107.000000T0000Z-210911T0145Z/
Salt Lake UT-Davis UT-
731 PM MDT Fri Sep 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM MDT
FOR CENTRAL SALT LAKE AND SOUTHEASTERN DAVIS COUNTIES...
At 731 PM MDT, severe thunderstorms were located along a line
extending from Bountiful to near Draper, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Salt Lake City, West Valley City, Sandy, Murray, Bountiful,
Taylorsville, Draper, Cottonwood Heights, Midvale, Holladay, South
Salt Lake, North Salt Lake, Millcreek, Granite, Cottonwood West,
Mount Olympus, Little Cottonwood Creek Valley, East Millcreek, Canyon
Rim and Emigration Canyon.
This includes the following highways...
Interstate 15 between mile markers 295 and 313.
Interstate 80 in Utah between mile markers 118 and 130.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4093 11180 4053 11172 4052 11178 4049 11179
4047 11186 4048 11188 4081 11195
TIME...MOT...LOC 0131Z 211DEG 31KT 4087 11188 4050 11181
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CRK584
WWUS55 KSLC 110142
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
742 PM MDT Fri Sep 10 2021
UTC011-035-110152-
/O.EXP.KSLC.SV.W.0107.000000T0000Z-210911T0145Z/
Salt Lake UT-Davis UT-
742 PM MDT Fri Sep 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SALT LAKE AND
SOUTHEASTERN DAVIS COUNTIES WILL EXPIRE AT 745 PM MDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
LAT...LON 4093 11180 4053 11172 4052 11178 4049 11179
4047 11186 4048 11188 4081 11195
TIME...MOT...LOC 0142Z 211DEG 48KT 4092 11183 4055 11176
$$
CRKThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 6:06 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Weber | 39 min |
| Sep 10, 6:20 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Morgan, Weber | 25 min |
| Sep 10, 6:42 PM MDT | Special Weather Statement | SLC | Morgan, Weber | 33 min |
| Sep 10, 6:42 PM MDT | Special Weather Statement | SLC | Davis | 33 min |
| Sep 10, 6:50 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Salt Lake, Tooele | 25 min |
| Sep 10, 7:10 PM MDT | Special Weather Statement | SLC | Salt Lake, Utah | 50 min |
| Sep 10, 7:10 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Morgan, Salt Lake, Weber | 35 min |
| Sep 10, 7:24 PM MDT | Special Weather Statement | SLC | Rich | 51 min |
| Sep 10, 7:24 PM MDT | Special Weather Statement | SLC | Cache | 51 min |
| Sep 10, 7:38 PM MDT | Special Weather Statement | SLC | Cache, Morgan, Rich, Weber | 52 min |
| Sep 11, 12:50 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
| Sep 11, 12:54 PM MDT | Special Weather Statement | SLC | Carbon | 51 min |
| Sep 11, 1:39 PM MDT | Special Weather Statement | SLC | Duchesne | 51 min |
| Sep 11, 1:40 PM MDT | Flash Flood Warning | SLC | Carbon | 3 hr |
| Sep 11, 3:17 PM MDT | Special Weather Statement | SLC | Duchesne | 43 min |
| Sep 11, 4:25 PM MDT | Special Weather Statement | SLC | Millard | 35 min |
| Sep 11, 5:10 PM MDT | Special Weather Statement | SLC | Juab | 35 min |
| Sep 11, 5:19 PM MDT | Special Weather Statement | SLC | Millard | 26 min |
| Sep 11, 5:44 PM MDT | Special Weather Statement | SLC | Millard | 46 min |
Nearby
Severe Thunderstorm Warnings in Utah, 2021Every severe thunderstorm 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.