Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 31, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 24, 2021, 3:40 PM MDT for Iron County, Washington County, Utah. It was in force for 35 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 24, 2021, 3:40 PM MDT (21:40 UTC)
- Expired
- Jul 24, 2021, 4:15 PM MDT
- In force
- 35 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Iron County, UT, Washington County, UT
The radar
The Cedar City radar (KICX), 60 km from the middle of the area, began a volume at 21:44 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, 9.7 hours before the alert went out and 215 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
- 335 J/kg
- Mixed-layer CIN
- -191 J/kg
- Mixed-layer LCL
- 2063 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
548
WUUS55 KSLC 242140
SVRSLC
UTC021-053-242215-
/O.NEW.KSLC.SV.W.0031.210724T2140Z-210724T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
340 PM MDT Sat Jul 24 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
North central Washington County in southwestern Utah...
South central Iron County in southern Utah...
* Until 415 PM MDT
* At 339 PM MDT, a severe thunderstorm was located 10 miles northeast
of Dameron Valley, or 31 miles east of Beaver Dam, moving northwest
at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Pine Valley, Pinto and Veyo.
This includes Utah Route 18 between mile markers 23 and 32.
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 3736 11335 3726 11354 3743 11375 3758 11347
TIME...MOT...LOC 2139Z 146DEG 8KT 3737 11350
HAIL...1.00IN
WIND...60MPH
$$
ND2 follow-up statements
860
WWUS55 KSLC 242159
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
359 PM MDT Sat Jul 24 2021
UTC021-242208-
/O.CAN.KSLC.SV.W.0031.000000T0000Z-210724T2215Z/
Iron UT-
359 PM MDT Sat Jul 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL IRON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, this warning has been cancelled.
LAT...LON 3734 11340 3726 11354 3743 11375 3753 11357
TIME...MOT...LOC 2158Z 146DEG 8KT 3741 11353
$$
UTC053-242215-
/O.CON.KSLC.SV.W.0031.000000T0000Z-210724T2215Z/
Washington UT-
359 PM MDT Sat Jul 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM MDT
FOR CENTRAL WASHINGTON COUNTY...
At 358 PM MDT, a severe thunderstorm was located 10 miles northeast
of Dameron Valley, or 29 miles east of Beaver Dam, moving northwest
at 10 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
Locations impacted include...
Pine Valley and Veyo.
This includes Utah Route 18 between mile markers 23 and 32.
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 3734 11340 3726 11354 3743 11375 3753 11357
TIME...MOT...LOC 2158Z 146DEG 8KT 3741 11353
HAIL...1.50IN
WIND...70MPH
$$
ND290
WWUS55 KSLC 242212
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
412 PM MDT Sat Jul 24 2021
UTC053-242222-
/O.EXP.KSLC.SV.W.0031.000000T0000Z-210724T2215Z/
Washington UT-
412 PM MDT Sat Jul 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WASHINGTON COUNTY WILL
EXPIRE AT 415 PM MDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However small hail
and gusty winds are still possible with this thunderstorm.
LAT...LON 3734 11340 3726 11354 3743 11375 3753 11357
TIME...MOT...LOC 2212Z 146DEG 8KT 3743 11355
$$
NDThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 6:14 PM MDT | Areal Flood Advisory | SLC | Washington | 61 min |
| Jul 24, 3:23 AM MDT | Flash Flood Watch | SLC | Beaver, Garfield, Iron, Kane, Piute, Washington and 1 more | 42 hr |
| Jul 24, 12:56 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Jul 24, 12:58 PM MDT | Special Weather Statement | SLC | Kane | 32 min |
| Jul 24, 1:34 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 4 hr |
| Jul 24, 2:13 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Jul 24, 2:24 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 21 min |
| Jul 24, 3:16 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 29 min |
| Jul 24, 4:04 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 26 min |
| Jul 24, 4:07 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
| Jul 24, 4:12 PM MDT | Flash Flood Warning | SLC | Iron, Washington | 3 hr |
| Jul 24, 4:30 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 30 min |
| Jul 24, 5:24 PM MDT | Flash Flood Warning | SLC | Washington | 3 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.