Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 16, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 15, 2021, 7:08 PM MDT for Iron County, Utah. It was in force for 52 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 15, 2021, 7:08 PM MDT (01:08 UTC)
- Expired
- Jul 15, 2021, 8:00 PM MDT
- In force
- 52 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 50.0 mph
County Iron County, UT
The radar
The Cedar City radar (KICX), 75 km from the middle of the area, began a volume at 01:11 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, 1.1 hours before the alert went out and 260 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
- 688 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 3158 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
849
WUUS55 KSLC 160108
SVRSLC
UTC021-160200-
/O.NEW.KSLC.SV.W.0016.210716T0108Z-210716T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
708 PM MDT Thu Jul 15 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
North central Iron County in southern Utah...
* Until 800 PM MDT
* At 708 PM MDT, a severe thunderstorm was located 33 miles southwest
of Milford, and is nearly stationary.
HAZARD...Golf ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect
damage to roofs, siding, windows, and vehicles.
* Locations impacted include...
Lund.
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 3800 11360 3815 11358 3815 11331 3796 11335
TIME...MOT...LOC 0108Z 266DEG 1KT 3809 11349
HAIL...1.75IN
WIND...<50MPH
$$
Church2 follow-up statements
756
WWUS55 KSLC 160130
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
730 PM MDT Thu Jul 15 2021
UTC021-160200-
/O.CON.KSLC.SV.W.0016.000000T0000Z-210716T0200Z/
Iron UT-
730 PM MDT Thu Jul 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR NORTH CENTRAL IRON COUNTY...
At 730 PM MDT, a severe thunderstorm was located 32 miles southwest
of Milford, and is nearly stationary.
HAZARD...Golf ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect damage
to roofs, siding, windows, and vehicles.
Locations impacted include...
Lund.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3800 11360 3815 11358 3815 11331 3796 11335
TIME...MOT...LOC 0130Z 266DEG 1KT 3809 11348
HAIL...1.75IN
WIND...<50MPH
$$
Church030
WWUS55 KSLC 160201
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
801 PM MDT Thu Jul 15 2021
UTC021-160210-
/O.EXP.KSLC.SV.W.0016.000000T0000Z-210716T0200Z/
Iron UT-
801 PM MDT Thu Jul 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH 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 heavy rain are still possible with this thunderstorm.
LAT...LON 3800 11360 3815 11358 3815 11331 3796 11335
TIME...MOT...LOC 0200Z 266DEG 1KT 3809 11347
$$
ChurchThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 6:35 PM MDT | Special Weather Statement | SLC | Salt Lake | 40 min |
| Jul 15, 8:39 PM MDT | Flash Flood Warning | SLC | Beaver, Iron | 3 hr |
| Jul 16, 12:39 AM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
| Jul 16, 1:05 AM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
| Jul 16, 1:09 AM MDT | Areal Flood Advisory | SLC | Washington | 3 hr |
| Jul 16, 1:07 PM MDT | Special Weather Statement | SLC | Kane | 38 min |
| Jul 16, 1:27 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Jul 16, 1:58 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
| Jul 16, 3:20 PM MDT | Special Weather Statement | SLC | 40 min | |
| Jul 16, 3:47 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
| Jul 16, 4:46 PM MDT | Special Weather Statement | SLC | Millard | 44 min |
| Jul 16, 5:04 PM MDT | Severe Thunderstorm Warning | SLC | Millard | 56 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.