Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 18, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 18, 2021, 4:31 PM MDT for Beaver County, Iron County, Utah. It was in force for 24 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
- Jul 18, 2021, 4:31 PM MDT (22:31 UTC)
- Expired
- Jul 18, 2021, 4:55 PM MDT
- In force
- 24 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Beaver County, UT, Iron County, UT
The radar
The Cedar City radar (KICX), 66 km from the middle of the area, began a volume at 22:32 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
Las Vegas, NV (KVEF), launched 12:00Z, 10.5 hours before the alert went out and 300 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
- 424 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 2704 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
088 WUUS55 KSLC 182231 SVRSLC UTC001-021-182315- /O.NEW.KSLC.SV.W.0018.210718T2231Z-210718T2315Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Salt Lake City UT 431 PM MDT Sun Jul 18 2021 The National Weather Service in Salt Lake City has issued a * Severe Thunderstorm Warning for... South central Beaver County in southern Utah... North central Iron County in southern Utah... * Until 515 PM MDT * At 431 PM MDT, a severe thunderstorm was located 19 miles south of Milford, moving west 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... Minersville. This includes Utah Route 21 between mile markers 86 and 92. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3828 11294 3813 11281 3791 11307 3825 11329 TIME...MOT...LOC 2231Z 068DEG 13KT 3812 11302 HAIL...0.75IN WIND...60MPH $$ Woodward
2 follow-up statements
578
WWUS55 KSLC 182246
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
446 PM MDT Sun Jul 18 2021
UTC001-021-182315-
/O.CON.KSLC.SV.W.0018.000000T0000Z-210718T2315Z/
Beaver UT-Iron UT-
446 PM MDT Sun Jul 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR SOUTH CENTRAL BEAVER AND NORTHEASTERN IRON COUNTIES...
At 445 PM MDT, a severe thunderstorm was located 16 miles south of
Milford, moving northwest at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Minersville.
This includes Utah Route 21 between mile markers 86 and 91.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3817 11286 3804 11302 3815 11323 3820 11326
3826 11319 3828 11296
TIME...MOT...LOC 2245Z 133DEG 7KT 3816 11301
HAIL...0.75IN
WIND...60MPH
$$
Woodward396
WWUS55 KSLC 182255
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
455 PM MDT Sun Jul 18 2021
UTC001-021-182305-
/O.CAN.KSLC.SV.W.0018.000000T0000Z-210718T2315Z/
Beaver UT-Iron UT-
455 PM MDT Sun Jul 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL BEAVER AND
NORTHEASTERN IRON COUNTIES 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 3817 11286 3804 11302 3815 11323 3820 11326
3826 11319 3828 11296
TIME...MOT...LOC 2250Z 068DEG 13KT 3815 11305
$$
WoodwardThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 3:12 PM MDT | Special Weather Statement | SLC | Beaver | 48 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.