Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 29, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 24, 2021, 2:24 PM MDT for Washington County, Utah. It was in force for 21 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 24, 2021, 2:24 PM MDT (20:24 UTC)
- Expired
- Jul 24, 2021, 2:45 PM MDT
- In force
- 21 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Washington County, UT
The radar
The Cedar City radar (KICX), 65 km from the middle of the area, began a volume at 20:26 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 24, 2:24 PM MDT | TSTM WND DMG | Hildale, UT | HILDALE DISPATCH REPORTED 10 POWERPOLES DOWN THROUGHOUT THE CITY ALONG WITH MULTIPLE DOWNED TREES. TIME ESTIMATED BY RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 8.4 hours before the alert went out and 230 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.
200 WUUS55 KSLC 242024 SVRSLC UTC053-242045- /O.NEW.KSLC.SV.W.0029.210724T2024Z-210724T2045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Salt Lake City UT 224 PM MDT Sat Jul 24 2021 The National Weather Service in Salt Lake City has issued a * Severe Thunderstorm Warning for... Southeastern Washington County in southwestern Utah... * Until 245 PM MDT * At 222 PM MDT, a severe thunderstorm was located over Colorado City, moving southwest at 15 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Hildale. 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 3701 11321 3711 11306 3700 11289 TIME...MOT...LOC 2022Z 037DEG 12KT 3700 11304 HAIL...1.00IN WIND...<50MPH $$ ND
2 follow-up statements
143 WWUS55 KSLC 242035 SVSSLC Severe Weather Statement National Weather Service Salt Lake City UT 235 PM MDT Sat Jul 24 2021 UTC053-242045- /O.CON.KSLC.SV.W.0029.000000T0000Z-210724T2045Z/ Washington UT- 235 PM MDT Sat Jul 24 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM MDT FOR SOUTHEASTERN WASHINGTON COUNTY... At 234 PM MDT, a severe thunderstorm was located near Colorado City, moving southwest at 15 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Hildale. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3701 11314 3708 11305 3700 11289 TIME...MOT...LOC 2034Z 037DEG 12KT 3697 11307 HAIL...1.00IN WIND...<50MPH $$ ND
722
WWUS55 KSLC 242042
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
242 PM MDT Sat Jul 24 2021
UTC053-242051-
/O.EXP.KSLC.SV.W.0029.000000T0000Z-210724T2045Z/
Washington UT-
242 PM MDT Sat Jul 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHINGTON COUNTY
WILL EXPIRE AT 245 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 3701 11314 3708 11305 3700 11289
TIME...MOT...LOC 2041Z 037DEG 12KT 3696 11308
$$
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, 3:16 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 29 min |
| Jul 24, 3:40 PM MDT | Severe Thunderstorm Warning | SLC | Iron, Washington | 35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.