Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 7, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 4, 2021, 4:42 PM MDT for Box Elder County, Utah. It was in force for 33 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
- Jun 4, 2021, 4:42 PM MDT (22:42 UTC)
- Expired
- Jun 4, 2021, 5:15 PM MDT
- In force
- 33 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Box Elder County, UT
The radar
The Salt Lake City radar (KMTX), 101 km from the middle of the area, began a volume at 22:43 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, 10.7 hours before the alert went out and 141 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
- 2 J/kg
- Mixed-layer CIN
- -432 J/kg
- Mixed-layer LCL
- 2741 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
566
WUUS55 KSLC 042242
SVRSLC
UTC003-042315-
/O.NEW.KSLC.SV.W.0007.210604T2242Z-210604T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
442 PM MDT Fri Jun 4 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
North central Box Elder County in northern Utah...
* Until 515 PM MDT
* At 442 PM MDT, a severe thunderstorm was located 12 miles southeast
of Almo, or 22 miles south of Malta, moving east at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Standrod.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4185 11314 4190 11353 4199 11353 4200 11314
4199 11313
TIME...MOT...LOC 2242Z 271DEG 15KT 4199 11344
HAIL...0.75IN
WIND...60MPH
$$
MT2 follow-up statements
301
WWUS55 KSLC 042259
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
459 PM MDT Fri Jun 4 2021
UTC003-042315-
/O.CON.KSLC.SV.W.0007.000000T0000Z-210604T2315Z/
Box Elder UT-
459 PM MDT Fri Jun 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR NORTH CENTRAL BOX ELDER COUNTY...
At 458 PM MDT, a severe thunderstorm was located 11 miles north of
Park Valley, or 22 miles south of Malta, moving east at 15 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Standrod.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4185 11314 4190 11353 4199 11353 4200 11314
4199 11313
TIME...MOT...LOC 2258Z 271DEG 15KT 4199 11335
HAIL...0.88IN
WIND...60MPH
$$
MT914
WWUS55 KSLC 042314
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
514 PM MDT Fri Jun 4 2021
UTC003-042324-
/O.EXP.KSLC.SV.W.0007.000000T0000Z-210604T2315Z/
Box Elder UT-
514 PM MDT Fri Jun 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BOX ELDER COUNTY
WILL EXPIRE AT 515 PM MDT...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Salt Lake City.
LAT...LON 4185 11314 4190 11353 4199 11353 4200 11314
4199 11313
TIME...MOT...LOC 2314Z 271DEG 15KT 4199 11327
$$
MTThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 2:33 AM MDT | Fire Weather Watch | SLC | Beaver, Carbon, Duchesne, Emery, Garfield, Iron and 7 more | 25 hr |
| Jun 4, 2:33 AM MDT | Red Flag Warning | SLC | Carbon, Duchesne, Emery, Juab, Millard, Sanpete | 7 days |
| Jun 4, 4:36 PM MDT | Special Weather Statement | SLC | Box Elder | 39 min |
| Jun 4, 5:49 PM MDT | Special Weather Statement | SLC | 41 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.