Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 45, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 29, 2021, 2:39 PM MDT for Beaver County, Iron County, Utah. It was in force for 36 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, 2:39 PM MDT (20:39 UTC)
- Expired
- Jul 29, 2021, 3:15 PM MDT
- In force
- 36 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Beaver County, UT, Iron County, UT
The radar
The Cedar City radar (KICX), 79 km from the middle of the area, began a volume at 20:39 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 8.7 hours before the alert went out and 285 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1489 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
162
WUUS55 KSLC 292039
SVRSLC
UTC001-021-292115-
/O.NEW.KSLC.SV.W.0045.210729T2039Z-210729T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
239 PM MDT Thu Jul 29 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
Eastern Beaver County in southern Utah...
Northeastern Iron County in southern Utah...
* Until 315 PM MDT
* At 239 PM MDT, a severe thunderstorm was located near Beaver,
moving northeast at 5 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Beaver and Manderfield.
This includes the following highways...
Interstate 15 between mile markers 105 and 121.
Utah Route 21 between mile markers 100 and 107.
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 3812 11249 3828 11284 3851 11284 3837 11250
TIME...MOT...LOC 2039Z 233DEG 5KT 3832 11270
HAIL...1.50IN
WIND...60MPH
$$
ND2 follow-up statements
508
WWUS55 KSLC 292054
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
254 PM MDT Thu Jul 29 2021
UTC021-292104-
/O.CAN.KSLC.SV.W.0045.000000T0000Z-210729T2115Z/
Iron UT-
254 PM MDT Thu Jul 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN IRON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3819 11252 3828 11284 3851 11284 3839 11255
TIME...MOT...LOC 2054Z 233DEG 5KT 3833 11268
$$
UTC001-292115-
/O.CON.KSLC.SV.W.0045.000000T0000Z-210729T2115Z/
Beaver UT-
254 PM MDT Thu Jul 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM MDT
FOR EASTERN BEAVER COUNTY...
At 254 PM MDT, a severe thunderstorm was located near Beaver, moving
northeast at 5 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Beaver and Manderfield.
This includes the following highways...
Interstate 15 between mile markers 108 and 121.
Utah Route 21 between mile markers 101 and 107.
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 3819 11252 3828 11284 3851 11284 3839 11255
TIME...MOT...LOC 2054Z 233DEG 5KT 3833 11268
HAIL...1.50IN
WIND...60MPH
$$
ND056
WWUS55 KSLC 292110
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
310 PM MDT Thu Jul 29 2021
UTC001-292119-
/O.EXP.KSLC.SV.W.0045.000000T0000Z-210729T2115Z/
Beaver UT-
310 PM MDT Thu Jul 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BEAVER COUNTY WILL
EXPIRE AT 315 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.
LAT...LON 3819 11252 3828 11284 3851 11284 3839 11255
TIME...MOT...LOC 2109Z 233DEG 5KT 3834 11266
$$
NDThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 7:56 PM MDT | Special Weather Statement | SLC | Tooele | 49 min |
| Jul 28, 9:52 PM MDT | Special Weather Statement | SLC | Davis | 83 min |
| Jul 29, 2:38 AM MDT | Flash Flood Watch | SLC | Emery, Garfield, Kane, San Juan, Sevier, Washington and 1 more | 21 hr |
| Jul 29, 1:40 PM MDT | Special Weather Statement | SLC | Iron | 20 min |
| Jul 29, 2:00 PM MDT | Severe Thunderstorm Warning | SLC | Iron, Washington | 30 min |
| Jul 29, 2:17 PM MDT | Special Weather Statement | SLC | Piute | 28 min |
| Jul 29, 2:26 PM MDT | Special Weather Statement | SLC | Beaver | 34 min |
| Jul 29, 2:50 PM MDT | Areal Flood Advisory | SLC | Beaver | 115 min |
| Jul 29, 3:13 PM MDT | Special Weather Statement | SLC | Beaver | 32 min |
| Jul 29, 3:33 PM MDT | Special Weather Statement | SLC | Iron | 27 min |
| Jul 29, 3:54 PM MDT | Special Weather Statement | SLC | Millard | 36 min |
| Jul 29, 4:11 PM MDT | Special Weather Statement | SLC | 34 min | |
| Jul 29, 4:22 PM MDT | Special Weather Statement | SLC | Juab | 23 min |
| Jul 29, 4:37 PM MDT | Special Weather Statement | SLC | Garfield | 23 min |
| Jul 29, 4:48 PM MDT | Severe Thunderstorm Warning | SLC | Garfield, Iron | 27 min |
| Jul 29, 4:54 PM MDT | Severe Thunderstorm Warning | SLC | Piute, Sevier | 36 min |
| Jul 29, 5:18 PM MDT | Special Weather Statement | SLC | Garfield | 27 min |
| Jul 29, 5:42 PM MDT | Severe Thunderstorm Warning | SLC | Garfield | 33 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.