Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 36, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 25, 2021, 5:42 PM MDT for Washington 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
- Jul 25, 2021, 5:42 PM MDT (23:42 UTC)
- Expired
- Jul 25, 2021, 6:15 PM MDT
- In force
- 33 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
County Washington County, UT
The radar
The Cedar City radar (KICX), 72 km from the middle of the area, began a volume at 23:46 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, 11.7 hours before the alert went out and 201 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
- 97 J/kg
- Mixed-layer CIN
- -248 J/kg
- Mixed-layer LCL
- 2117 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
576
WUUS55 KSLC 252342
SVRSLC
UTC053-260015-
/O.NEW.KSLC.SV.W.0036.210725T2342Z-210726T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
542 PM MDT Sun Jul 25 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
South central Washington County in southwestern Utah...
* Until 615 PM MDT
* At 541 PM MDT, a severe thunderstorm was located 9 miles east of
Dameron Valley, or 30 miles northeast of Virgin River Gorge, moving
south at 10 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
St George, Washington, Hurricane, Santa Clara, Sand Hollow State
Park, Dameron Valley, Quail Creek State Park, Ivins, Leeds, Veyo
and Snow Canyon State Park.
This includes the following highways...
Interstate 15 between mile markers 9 and 24.
Utah Route 18 between mile markers 2 and 21.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3735 11371 3736 11335 3711 11332 3710 11372
TIME...MOT...LOC 2341Z 356DEG 9KT 3728 11350
HAIL...1.25IN
WIND...60MPH
$$
ND2 follow-up statements
553
WWUS55 KSLC 252353
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
553 PM MDT Sun Jul 25 2021
UTC053-260015-
/O.CON.KSLC.SV.W.0036.000000T0000Z-210726T0015Z/
Washington UT-
553 PM MDT Sun Jul 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT
FOR SOUTH CENTRAL WASHINGTON COUNTY...
At 553 PM MDT, a severe thunderstorm was located 7 miles northwest of
Quail Creek State Park, or 28 miles northeast of Virgin River Gorge,
moving south at 10 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
St George, Washington, Hurricane, Santa Clara, Sand Hollow State
Park, Quail Creek State Park, Dameron Valley, Ivins, Leeds and Snow
Canyon State Park.
This includes the following highways...
Interstate 15 between mile markers 9 and 24.
Utah Route 18 between mile markers 2 and 16.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3729 11371 3730 11335 3711 11332 3710 11372
TIME...MOT...LOC 2353Z 356DEG 9KT 3725 11350
HAIL...1.25IN
WIND...60MPH
$$
ND927
WWUS55 KSLC 260011
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
611 PM MDT Sun Jul 25 2021
UTC053-260021-
/O.EXP.KSLC.SV.W.0036.000000T0000Z-210726T0015Z/
Washington UT-
611 PM MDT Sun Jul 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WASHINGTON
COUNTY WILL EXPIRE AT 615 PM MDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
LAT...LON 3729 11371 3730 11335 3711 11332 3710 11372
TIME...MOT...LOC 0011Z 356DEG 9KT 3721 11350
$$
NDThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 7:17 PM MDT | Special Weather Statement | SLC | Garfield | 28 min |
| Jul 24, 8:08 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
| Jul 25, 2:25 PM MDT | Flash Flood Warning | SLC | Iron | 3 hr |
| Jul 25, 2:49 PM MDT | Special Weather Statement | SLC | Piute | 26 min |
| Jul 25, 2:53 PM MDT | Special Weather Statement | SLC | Beaver | 37 min |
| Jul 25, 3:11 PM MDT | Special Weather Statement | SLC | Piute | 34 min |
| Jul 25, 3:18 PM MDT | Special Weather Statement | SLC | Sevier | 27 min |
| Jul 25, 3:33 PM MDT | Special Weather Statement | SLC | Iron | 27 min |
| Jul 25, 3:49 PM MDT | Severe Thunderstorm Warning | SLC | Iron | 26 min |
| Jul 25, 4:11 PM MDT | Flash Flood Warning | SLC | Iron | 3 hr |
| Jul 25, 4:21 PM MDT | Special Weather Statement | SLC | Washington | 24 min |
| Jul 25, 4:29 PM MDT | Areal Flood Advisory | SLC | Iron | 3 hr |
| Jul 25, 4:41 PM MDT | Special Weather Statement | SLC | Washington | 19 min |
| Jul 25, 4:41 PM MDT | Special Weather Statement | SLC | Iron | 49 min |
| Jul 25, 4:52 PM MDT | Flash Flood Warning | SLC | Iron, Kane, Washington | 4 hr |
| Jul 25, 5:16 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Jul 25, 5:26 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 19 min |
| Jul 25, 5:44 PM MDT | Special Weather Statement | SLC | Washington | 31 min |
| Jul 25, 5:52 PM MDT | Special Weather Statement | SLC | Washington | 23 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.