Alert archive / Utah / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 95, NWS Salt Lake City, UT

August 26, 2021Emery County, Wayne County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 26, 2021, 2:50 PM MDT for Emery County, Wayne County, Utah. It was in force for 25 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
Aug 26, 2021, 2:50 PM MDT (20:50 UTC)
Expired
Aug 26, 2021, 3:15 PM MDT
In force
25 min
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Emery County, UT, Wayne County, UT

The radar

The Cedar City radar (KICX), 205 km from the middle of the area, began a volume at 20:53 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 12:00Z, 8.8 hours before the alert went out and 213 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-pSkew-T log-p diagram, Grand Junction, CO at 12:00Z on 2021-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2021-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -78 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3119 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-78 m²/s²
0-3 km storm-relative helicity
-14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

530 
WUUS55 KSLC 262050
SVRSLC
UTC015-055-262115-
/O.NEW.KSLC.SV.W.0095.210826T2050Z-210826T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
250 PM MDT Thu Aug 26 2021

The National Weather Service in Salt Lake City has issued a

* Severe Thunderstorm Warning for...
  Central Wayne County in southern Utah...
  South central Emery County in central Utah...

* Until 315 PM MDT

* At 249 PM MDT, a severe thunderstorm was located near Hanksville,
  moving east at 25 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...
  Hanksville.

This includes the following highways...
 Utah Route 24 between mile markers 103 and 131.
 Utah Route 95 between mile markers 0 and 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3819 11085 3841 11098 3859 11057 3829 11039
TIME...MOT...LOC 2049Z 247DEG 20KT 3837 11082 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MT
1 follow-up statement
595 
WWUS55 KSLC 262101
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
301 PM MDT Thu Aug 26 2021

UTC015-055-262115-
/O.CON.KSLC.SV.W.0095.000000T0000Z-210826T2115Z/
Wayne UT-Emery UT-
301 PM MDT Thu Aug 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM MDT
FOR CENTRAL WAYNE AND SOUTH CENTRAL EMERY COUNTIES...

At 300 PM MDT, a severe thunderstorm was located over Hanksville,
moving east at 25 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...
Hanksville.

This includes the following highways...
 Utah Route 24 between mile markers 103 and 131.
 Utah Route 95 between mile markers 0 and 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3819 11085 3841 11098 3859 11057 3829 11039
TIME...MOT...LOC 2100Z 257DEG 21KT 3833 11070 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MT

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 6:02 PM MDTSpecial Weather StatementSLCUtah28 min
Aug 25, 6:30 PM MDTSpecial Weather StatementSLCSalt Lake30 min
Aug 25, 6:48 PM MDTSpecial Weather StatementSLCWasatch27 min
Aug 25, 7:24 PM MDTSpecial Weather StatementSLCUtah36 min
Aug 25, 10:10 PM MDTSpecial Weather StatementSLCSalt Lake35 min
Aug 26, 1:23 PM MDTSpecial Weather StatementSLCDuchesne37 min
Aug 26, 2:27 PM MDTSpecial Weather StatementSLCWayne33 min
Aug 26, 3:00 PM MDTSpecial Weather StatementSLCEmery45 min
Aug 26, 3:09 PM MDTSevere Thunderstorm WarningSLCEmery36 min
Aug 26, 3:13 PM MDTSevere Thunderstorm WarningSLCEmery, Wayne32 min
Aug 26, 3:28 PM MDTFlash Flood Warning Considerable damage threatSLCEmery, Wayne3 hr
Aug 26, 3:44 PM MDTSpecial Weather StatementSLCEmery31 min
Aug 26, 3:49 PM MDTSpecial Weather StatementSLC26 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.