Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 116, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Oct 8, 2021, 3:56 PM MDT for Tooele County, Utah. It was in force for 30 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
- Oct 8, 2021, 3:56 PM MDT (21:56 UTC)
- Expired
- Oct 8, 2021, 4:26 PM MDT
- In force
- 30 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Tooele County, UT
The radar
The Salt Lake City radar (KMTX), 103 km from the middle of the area, began a volume at 21:56 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
Elko, NV (KLKN), launched 12:00Z, 9.9 hours before the alert went out and 56 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
- 1023 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
421
WUUS55 KSLC 082156
SVRSLC
UTC045-082245-
/O.NEW.KSLC.SV.W.0116.211008T2156Z-211008T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
356 PM MDT Fri Oct 8 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
Northwestern Tooele County in northern Utah...
* Until 445 PM MDT
* At 356 PM MDT, a severe thunderstorm was located 18 miles east of
Wendover, moving northeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Knolls, Utah Test and Training Range North and Bonneville Salt
Flats.
This includes Interstate 80 in Utah between mile markers 11 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4101 11348 4100 11340 4074 11316 4054 11377
4070 11389
TIME...MOT...LOC 2156Z 230DEG 22KT 4069 11367
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CRK2 follow-up statements
372
WWUS55 KSLC 082212
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
412 PM MDT Fri Oct 8 2021
UTC045-082245-
/O.CON.KSLC.SV.W.0116.000000T0000Z-211008T2245Z/
Tooele UT-
412 PM MDT Fri Oct 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM MDT
FOR NORTHWESTERN TOOELE COUNTY...
At 412 PM MDT, a severe thunderstorm was located 15 miles west of
Knolls, or 23 miles east of Wendover, moving northeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Knolls and Utah Test and Training Range North.
This includes Interstate 80 in Utah between mile markers 16 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4101 11348 4100 11340 4074 11316 4059 11369
4070 11379
TIME...MOT...LOC 2212Z 230DEG 22KT 4075 11357
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CRK511
WWUS55 KSLC 082226
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
426 PM MDT Fri Oct 8 2021
UTC045-082236-
/O.CAN.KSLC.SV.W.0116.000000T0000Z-211008T2245Z/
Tooele UT-
426 PM MDT Fri Oct 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN TOOELE COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
LAT...LON 4101 11348 4100 11340 4074 11316 4059 11369
4070 11379
TIME...MOT...LOC 2224Z 230DEG 22KT 4081 11348
$$
CRKThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 7, 6:17 PM MDT | Special Weather Statement | SLC | Tooele | 43 min |
| Oct 7, 7:26 PM MDT | Special Weather Statement | SLC | Tooele | 49 min |
| Oct 7, 9:13 PM MDT | Special Weather Statement | SLC | Weber | 47 min |
| Oct 8, 2:58 PM MDT | Special Weather Statement | SLC | Tooele | 47 min |
| Oct 8, 3:09 PM MDT | Special Weather Statement | SLC | 51 min | |
| Oct 8, 3:21 PM MDT | Special Weather Statement | SLC | Box Elder | 54 min |
| Oct 8, 3:36 PM MDT | Severe Thunderstorm Warning | SLC | Tooele | 24 min |
| Oct 8, 4:43 PM MDT | Special Weather Statement | SLC | 47 min | |
| Oct 8, 5:23 PM MDT | Special Weather Statement | SLC | 52 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.