Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 49, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 29, 2021, 7:41 PM MDT for Garfield County, Wayne County, Utah. It was in force for 34 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 29, 2021, 7:41 PM MDT (01:41 UTC)
- Expired
- Jul 29, 2021, 8:15 PM MDT
- In force
- 34 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Garfield County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 157 km from the middle of the area, began a volume at 01:45 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
Grand Junction, CO (KGJT), launched 00:00Z, 1.7 hours before the alert went out and 260 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
- 407 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 2854 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
835
WUUS55 KSLC 300141
SVRSLC
UTC017-055-300215-
/O.NEW.KSLC.SV.W.0049.210730T0141Z-210730T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
741 PM MDT Thu Jul 29 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
North central Garfield County in southern Utah...
Southwestern Wayne County in southern Utah...
* Until 815 PM MDT
* At 741 PM MDT, a severe thunderstorm was located near Capitol Reef
National Park, moving northwest at 20 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...
Capitol Reef National Park, Torrey, Teasdale and Fruita.
This includes the following highways...
Utah Route 12 between mile markers 107 and 122.
Utah Route 24 between mile markers 66 and 84.
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 3822 11108 3807 11118 3816 11156 3841 11140
TIME...MOT...LOC 0141Z 116DEG 17KT 3818 11122
HAIL...1.25IN
WIND...60MPH
$$
ND2 follow-up statements
100
WWUS55 KSLC 300157
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
757 PM MDT Thu Jul 29 2021
UTC017-055-300215-
/O.CON.KSLC.SV.W.0049.000000T0000Z-210730T0215Z/
Garfield UT-Wayne UT-
757 PM MDT Thu Jul 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM MDT
FOR NORTH CENTRAL GARFIELD AND SOUTHWESTERN WAYNE COUNTIES...
At 757 PM MDT, a severe thunderstorm was located 7 miles southwest of
Capitol Reef National Park, moving northwest at 20 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Capitol Reef National Park, Torrey, Teasdale and Fruita.
This includes the following highways...
Utah Route 12 between mile markers 107 and 122.
Utah Route 24 between mile markers 66 and 84.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3822 11108 3807 11118 3816 11156 3841 11140
TIME...MOT...LOC 0157Z 116DEG 17KT 3821 11131
HAIL...1.25IN
WIND...60MPH
$$
ND386
WWUS55 KSLC 300208
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
808 PM MDT Thu Jul 29 2021
UTC017-055-300218-
/O.EXP.KSLC.SV.W.0049.000000T0000Z-210730T0215Z/
Garfield UT-Wayne UT-
808 PM MDT Thu Jul 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL GARFIELD AND
SOUTHWESTERN WAYNE COUNTIES WILL EXPIRE AT 815 PM MDT...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire. However small
hail and gusty winds are still possible with this thunderstorm.
LAT...LON 3822 11108 3807 11118 3816 11156 3841 11140
TIME...MOT...LOC 0208Z 116DEG 17KT 3822 11133
$$
NDThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 6:03 PM MDT | Flash Flood Warning | SLC | Garfield | 117 min |
| Jul 29, 6:03 PM MDT | Special Weather Statement | SLC | Kane | 27 min |
| Jul 29, 6:24 PM MDT | Special Weather Statement | SLC | Kane | 36 min |
| Jul 29, 7:06 PM MDT | Special Weather Statement | SLC | Washington | 24 min |
| Jul 29, 7:16 PM MDT | Special Weather Statement | SLC | Wayne | 29 min |
| Jul 29, 7:23 PM MDT | Special Weather Statement | SLC | Wayne | 37 min |
| Jul 29, 7:40 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Jul 29, 7:46 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Jul 29, 7:52 PM MDT | Flash Flood Warning | SLC | Garfield, Wayne | 113 min |
| Jul 29, 8:11 PM MDT | Special Weather Statement | SLC | Iron | 19 min |
| Jul 29, 8:51 PM MDT | Special Weather Statement | SLC | Iron | 39 min |
| Jul 29, 9:01 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Jul 29, 9:42 PM MDT | Special Weather Statement | SLC | Carbon | 63 min |
| Jul 30, 3:38 AM MDT | Flash Flood Watch | SLC | Beaver, Garfield, Iron, Kane, Piute, Washington and 1 more | 19 hr |
| Jul 30, 2:17 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Jul 30, 2:18 PM MDT | Special Weather Statement | SLC | Sevier | 42 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.