Alert archive / Utah / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Salt Lake City, UT

July 14, 2021Iron County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 14, 2021, 4:01 PM MDT for Iron County, Utah. It was in force for 44 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 14, 2021, 4:01 PM MDT (22:01 UTC)
Expired: Jul 14, 2021, 4:45 PM MDT
In force: 44 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Iron County, UT

The radar

The Cedar City radar (KICX), 62 km from the middle of the area, began a volume at 22:00 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

Las Vegas, NV (KVEF), launched 12:00Z, 10.0 hours before the alert went out and 249 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: 448 J/kg
Mixed-layer CIN: -374 J/kg
Mixed-layer LCL: 2057 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

598 
WUUS55 KSLC 142201
SVRSLC
UTC021-142245-
/O.NEW.KSLC.SV.W.0011.210714T2201Z-210714T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
401 PM MDT Wed Jul 14 2021

The National Weather Service in Salt Lake City has issued a

* Severe Thunderstorm Warning for...
  Central Iron County in southern Utah...

* Until 445 PM MDT

* At 401 PM MDT, a severe thunderstorm was located 27 miles northwest
  of Enoch, or 29 miles northwest of Cedar City, moving south at 10
  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...
  Lund.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3797 11364 3807 11340 3784 11315 3771 11338
      3772 11358
TIME...MOT...LOC 2201Z 342DEG 9KT 3794 11349 

HAIL...1.00IN
WIND...60MPH
 
$$

Church

2 follow-up statements

466 
WWUS55 KSLC 142215
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
415 PM MDT Wed Jul 14 2021

UTC021-142245-
/O.CON.KSLC.SV.W.0011.000000T0000Z-210714T2245Z/
Iron UT-
415 PM MDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM MDT
FOR CENTRAL IRON COUNTY...

At 415 PM MDT, a severe thunderstorm was located 25 miles northwest
of Enoch, or 27 miles northwest of Cedar City, moving south at 10
mph.

HAZARD...Golf 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...
Lund.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3797 11364 3804 11338 3784 11315 3771 11338
      3772 11358
TIME...MOT...LOC 2215Z 342DEG 9KT 3791 11348 

HAIL...1.75IN
WIND...60MPH
 
$$

Church

444 
WWUS55 KSLC 142246
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
446 PM MDT Wed Jul 14 2021

UTC021-142255-
/O.EXP.KSLC.SV.W.0011.000000T0000Z-210714T2245Z/
Iron UT-
446 PM MDT Wed Jul 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL IRON COUNTY HAS
EXPIRED...
                
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 has been allowed to expire.  However small
hail and gusty winds are still possible with this thunderstorm.

Remember, a Severe Thunderstorm Warning still remains in effect for
eastern Iron County.

LAT...LON 3797 11364 3804 11338 3784 11315 3771 11338
      3772 11358
TIME...MOT...LOC 2245Z 342DEG 9KT 3784 11345 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 6:02 PM MDT	Special Weather Statement	SLC	Beaver, Iron	58 min
Jul 13, 7:10 PM MDT	Special Weather Statement	SLC	Iron	65 min
Jul 13, 8:14 PM MDT	Special Weather Statement	SLC	Washington	61 min
Jul 14, 9:32 AM MDT	Flash Flood Watch	SLC	Emery, Garfield, Kane, San Juan, Sevier, Washington and 1 more	12 hr
Jul 14, 1:36 PM MDT	Special Weather Statement	SLC	Duchesne	39 min
Jul 14, 2:27 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Carbon	2 hr
Jul 14, 2:28 PM MDT	Special Weather Statement	SLC	Kane	62 min
Jul 14, 3:06 PM MDT	Special Weather Statement	SLC	Garfield	39 min
Jul 14, 3:31 PM MDT	Severe Thunderstorm Warning	SLC	Garfield	29 min
Jul 14, 3:45 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Garfield, Kane, San Juan	6 hr
Jul 14, 4:21 PM MDT	Special Weather Statement	SLC	Carbon	39 min
Jul 14, 4:39 PM MDT	Severe Thunderstorm Warning	SLC	Iron	66 min
Jul 14, 4:54 PM MDT	Areal Flood Advisory	SLC	Iron	111 min
Jul 14, 5:04 PM MDT	Special Weather Statement	SLC	Salt Lake	41 min
Jul 14, 5:06 PM MDT	Special Weather Statement	SLC	Emery	54 min
Jul 14, 5:20 PM MDT	Special Weather Statement	SLC	Kane	40 min
Jul 14, 5:29 PM MDT	Areal Flood Advisory	SLC	Iron	2 hr
Jul 14, 5:35 PM MDT	Severe Thunderstorm Warning	SLC	Emery	40 min
Jul 14, 5:42 PM MDT	Special Weather Statement	SLC	Utah	48 min

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.