Alert archive / Utah / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 39, NWS Salt Lake City, UT

July 26, 2021Beaver County, Iron County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 26, 2021, 3:07 PM MDT for Beaver County, Iron County, Utah. It was in force for 23 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, 3:07 PM MDT (21:07 UTC)
Expired: Jul 26, 2021, 3:30 PM MDT
In force: 23 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Beaver County, UT, Iron County, UT

The radar

The Cedar City radar (KICX), 65 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 301 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 4141 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: -27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

865 
WUUS55 KSLC 262107
SVRSLC
UTC001-021-262130-
/O.NEW.KSLC.SV.W.0039.210726T2107Z-210726T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
307 PM MDT Mon Jul 26 2021

The National Weather Service in Salt Lake City has issued a

* Severe Thunderstorm Warning for...
  South central Beaver County in southern Utah...
  Northeastern Iron County in southern Utah...

* Until 330 PM MDT

* At 307 PM MDT, a severe thunderstorm was located 15 miles southwest
  of Beaver, moving northwest at 10 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...
  Minersville and Adamsville. 

This includes Utah Route 21 between mile markers 86 and 100.
 
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 3811 11271 3808 11292 3823 11311 3835 11280
TIME...MOT...LOC 2107Z 153DEG 9KT 3815 11286 

HAIL...1.25IN
WIND...60MPH
 
$$

Webber

1 follow-up statement

634 
WWUS55 KSLC 262134
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
334 PM MDT Mon Jul 26 2021

UTC001-021-262143-
/O.EXP.KSLC.SV.W.0039.000000T0000Z-210726T2130Z/
Beaver UT-Iron UT-
334 PM MDT Mon Jul 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL BEAVER AND
NORTHEASTERN IRON COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.  However heavy rain is still possible with 
this thunderstorm. A new Flash Flood Warning has been issued through 
645 PM.

LAT...LON 3811 11271 3808 11292 3823 11311 3835 11280
TIME...MOT...LOC 2133Z 153DEG 9KT 3820 11290 

$$

Webber

The 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 Considerable damage threat	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 Considerable damage threat	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 Considerable damage threat	SLC	Iron	115 min
Jul 26, 2:45 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Garfield	4 hr
Jul 26, 2:53 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Iron, Washington	3 hr
Jul 26, 3:01 PM MDT	Severe Thunderstorm Warning	SLC	Beaver, Iron	29 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 Considerable damage threat	SLC	Beaver	3 hr
Jul 26, 4:00 PM MDT	Severe Thunderstorm Warning	SLC	Washington	30 min
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 Considerable damage threat	SLC	Kane	6 hr

Nearby

Severe Thunderstorm Warnings in Utah, 2021 Every 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.