Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 42, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 26, 2021, 4:00 PM MDT for Washington 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
- Jul 26, 2021, 4:00 PM MDT (22:00 UTC)
- Expired
- Jul 26, 2021, 4:30 PM MDT
- In force
- 30 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), 76 km from the middle of the area, began a volume at 22:00 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, 10.0 hours before the alert went out and 198 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
- 467 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1095 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
548
WUUS55 KSLC 262200
SVRSLC
UTC053-262230-
/O.NEW.KSLC.SV.W.0042.210726T2200Z-210726T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
400 PM MDT Mon Jul 26 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
Central Washington County in southwestern Utah...
* Until 430 PM MDT
* At 400 PM MDT, severe thunderstorms were located along a line
extending from near Dameron Valley to near Washington, moving north
at 15 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, Dameron Valley, Gunlock State
Park, Quail Creek State Park, Ivins, Gunlock, Veyo and Snow Canyon
State Park.
This includes the following highways...
Interstate 15 between mile markers 12 and 20.
Utah Route 18 between mile markers 6 and 28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3749 11390 3739 11337 3711 11340 3718 11374
TIME...MOT...LOC 2200Z 169DEG 13KT 3723 11367 3719 11350
HAIL...1.25IN
WIND...60MPH
$$
Webber2 follow-up statements
230
WWUS55 KSLC 262217
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
417 PM MDT Mon Jul 26 2021
UTC053-262230-
/O.CON.KSLC.SV.W.0042.000000T0000Z-210726T2230Z/
Washington UT-
417 PM MDT Mon Jul 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MDT
FOR CENTRAL WASHINGTON COUNTY...
At 417 PM MDT, severe thunderstorms were located along a line
extending from Dameron Valley to 7 miles north of Washington, moving
north at 15 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Washington, Hurricane, Dameron Valley, Quail Creek State Park, Ivins,
Veyo and Snow Canyon State Park.
This includes the following highways...
Interstate 15 between mile markers 14 and 20.
Utah Route 18 between mile markers 7 and 28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3747 11381 3739 11337 3714 11340 3717 11368
TIME...MOT...LOC 2217Z 169DEG 13KT 3729 11368 3725 11351
HAIL...1.25IN
WIND...60MPH
$$
Webber928
WWUS55 KSLC 262235
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
435 PM MDT Mon Jul 26 2021
UTC053-262244-
/O.EXP.KSLC.SV.W.0042.000000T0000Z-210726T2230Z/
Washington UT-
435 PM MDT Mon Jul 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WASHINGTON COUNTY HAS
EXPIRED...
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 has been allowed to expire. However small
hail and gusty winds are still possible with these thunderstorms. A
new Significant Weather Advisory has been issued for this storm and
is valid through 515 PM.
LAT...LON 3747 11381 3739 11337 3714 11340 3717 11368
TIME...MOT...LOC 2234Z 169DEG 13KT 3735 11369 3731 11352
$$
WebberThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 6:06 PM MDT | Special Weather Statement | SLC | Washington | 39 min |
| Jul 25, 6:16 PM MDT | Special Weather Statement | SLC | Washington | 44 min |
| Jul 26, 3:37 AM MDT | Flash Flood Watch | SLC | Beaver, Garfield, Iron, Kane, Piute, Washington and 1 more | 20 hr |
| Jul 26, 1:13 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
| Jul 26, 1:37 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 23 min |
| Jul 26, 1:40 PM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
| Jul 26, 1:47 PM MDT | Special Weather Statement | SLC | Piute | 43 min |
| Jul 26, 2:00 PM MDT | Special Weather Statement | SLC | Washington | 45 min |
| Jul 26, 2:07 PM MDT | Areal Flood Advisory | SLC | Washington | 53 min |
| Jul 26, 2:12 PM MDT | Areal Flood Advisory | SLC | Iron | 2 hr |
| Jul 26, 2:35 PM MDT | Flash Flood Warning | SLC | Iron | 115 min |
| Jul 26, 2:45 PM MDT | Flash Flood Warning | SLC | Garfield | 4 hr |
| Jul 26, 2:53 PM MDT | Flash Flood Warning | SLC | Iron, Washington | 3 hr |
| Jul 26, 3:01 PM MDT | Severe Thunderstorm Warning | SLC | Beaver, Iron | 29 min |
| Jul 26, 3:07 PM MDT | Severe Thunderstorm Warning | SLC | Beaver, Iron | 23 min |
| Jul 26, 3:20 PM MDT | Severe Thunderstorm Warning | SLC | Beaver, Iron | 2 min |
| Jul 26, 3:26 PM MDT | Special Weather Statement | SLC | Washington | 49 min |
| Jul 26, 3:30 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 30 min |
| Jul 26, 3:32 PM MDT | Areal Flood Advisory | SLC | Washington | 118 min |
| Jul 26, 3:32 PM MDT | Flash Flood Warning | SLC | Beaver | 3 hr |
| Jul 26, 4:34 PM MDT | Special Weather Statement | SLC | Washington | 41 min |
| Jul 26, 4:55 PM MDT | Special Weather Statement | SLC | Beaver | 50 min |
| Jul 26, 5:30 PM MDT | Flash Flood Warning | SLC | Kane | 6 hr |
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.