Alert archive / Utah / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 14, NWS Salt Lake City, UT

July 14, 2021Iron County, Washington County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 14, 2021, 6:25 PM MDT for Iron County, Washington County, Utah. It was in force for 50 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, 6:25 PM MDT (00:25 UTC)
Expired: Jul 14, 2021, 7:15 PM MDT
In force: 50 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Iron County, UT, Washington County, UT

The radar

The Cedar City radar (KICX), 64 km from the middle of the area, began a volume at 00:25 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 00:00Z, 0.4 hours before the alert went out and 226 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: 523 J/kg
Mixed-layer CIN: -274 J/kg
Mixed-layer LCL: 2860 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

345 
WUUS55 KSLC 150025
SVRSLC
UTC021-053-150115-
/O.NEW.KSLC.SV.W.0014.210715T0025Z-210715T0115Z/

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

The National Weather Service in Salt Lake City has issued a

* Severe Thunderstorm Warning for...
  North central Washington County in southwestern Utah...
  Southwestern Iron County in southern Utah...

* Until 715 PM MDT

* At 624 PM MDT, a severe thunderstorm was located 24 miles northwest
  of New Harmony, or 29 miles west of Cedar City, moving southeast at
  15 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...
  Enterprise, Pinto and Newcastle. 

This includes the following highways...
 Utah Route 18 between mile markers 34 and 51.
 Utah Route 56 between mile markers 17 and 48.

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 3776 11380 3786 11355 3768 11323 3753 11339
      3749 11373
TIME...MOT...LOC 0024Z 308DEG 13KT 3774 11360 

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

Church

3 follow-up statements

835 
WWUS55 KSLC 150034
SVSSLC

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

UTC021-053-150115-
/O.CON.KSLC.SV.W.0014.000000T0000Z-210715T0115Z/
Washington UT-Iron UT-
634 PM MDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT
FOR NORTH CENTRAL WASHINGTON AND SOUTHWESTERN IRON COUNTIES...

At 633 PM MDT, a severe thunderstorm was located 21 miles northwest
of New Harmony, or 27 miles west of Cedar City, moving southeast at
15 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...
Enterprise, Pinto and Newcastle. 

This includes the following highways...
 Utah Route 18 between mile markers 34 and 51.
 Utah Route 56 between mile markers 17 and 48.

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 3776 11380 3786 11355 3768 11323 3753 11339
      3749 11373
TIME...MOT...LOC 0033Z 308DEG 13KT 3772 11357 

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

Church

225 
WWUS55 KSLC 150102
SVSSLC

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

UTC021-053-150115-
/O.CON.KSLC.SV.W.0014.000000T0000Z-210715T0115Z/
Washington UT-Iron UT-
702 PM MDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT
FOR NORTHWESTERN WASHINGTON AND SOUTHWESTERN IRON COUNTIES...

At 702 PM MDT, a severe thunderstorm was located 14 miles northwest
of New Harmony, or 21 miles west of Cedar City, moving southeast at
15 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...
Enterprise, Pinto and Newcastle. 

This includes the following highways...
 Utah Route 18 between mile markers 34 and 51.
 Utah Route 56 between mile markers 17 and 43.

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 3776 11380 3779 11353 3767 11330 3753 11345
      3749 11373
TIME...MOT...LOC 0102Z 308DEG 13KT 3766 11347 

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

Church

478 
WWUS55 KSLC 150115
SVSSLC

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

UTC021-053-150125-
/O.EXP.KSLC.SV.W.0014.000000T0000Z-210715T0115Z/
Washington UT-Iron UT-
715 PM MDT Wed Jul 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WASHINGTON AND
SOUTHWESTERN IRON COUNTIES 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, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 3776 11380 3779 11353 3767 11330 3753 11345
      3749 11373
TIME...MOT...LOC 0115Z 308DEG 13KT 3763 11343 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 6:20 PM MDT	Special Weather Statement	SLC	Emery	40 min
Jul 14, 6:49 PM MDT	Special Weather Statement	SLC	Iron	41 min
Jul 14, 7:07 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Kane, Washington	3 hr
Jul 14, 7:53 PM MDT	Severe Thunderstorm Warning	SLC	Washington	69 min
Jul 15, 2:53 AM MDT	Flash Flood Watch	SLC	Beaver, Emery, Garfield, Iron, Kane, Piute and 4 more	25 hr
Jul 15, 4:43 PM MDT	Special Weather Statement	SLC	Carbon	47 min
Jul 15, 5:01 PM MDT	Special Weather Statement	SLC	Garfield	44 min
Jul 15, 5:03 PM MDT	Special Weather Statement	SLC	Tooele	57 min
Jul 15, 5:29 PM MDT	Special Weather Statement	SLC	Weber	61 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.