Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 65, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 14, 2021, 5:25 PM MDT for Washington County, Utah. It was in force for 36 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 14, 2021, 5:25 PM MDT (23:25 UTC)
- Expired
- Aug 14, 2021, 6:01 PM MDT
- In force
- 36 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Washington County, UT
The radar
The Cedar City radar (KICX), 87 km from the middle of the area, began a volume at 23:24 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, 11.4 hours before the alert went out and 190 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
- 356 J/kg
- Mixed-layer CIN
- -261 J/kg
- Mixed-layer LCL
- 2691 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
453
WUUS55 KSLC 142325
SVRSLC
UTC053-150015-
/O.NEW.KSLC.SV.W.0065.210814T2325Z-210815T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
525 PM MDT Sat Aug 14 2021
The National Weather Service in Salt Lake City has issued a
* Severe Thunderstorm Warning for...
Northwestern Washington County in southwestern Utah...
* Until 615 PM MDT
* At 523 PM MDT, severe thunderstorms were located along a line
extending from 8 miles east of Beaver Dam to 12 miles north of
Dameron Valley, moving south 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...
Dameron Valley, Motoqua, Veyo and Goldstrike.
This includes Utah Route 18 between mile markers 17 and 35.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
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.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3732 11405 3729 11353 3753 11354 3754 11394
TIME...MOT...LOC 2323Z 014DEG 14KT 3748 11390 3747 11361
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Woodward2 follow-up statements
175 WWUS55 KSLC 142349 SVSSLC Severe Weather Statement National Weather Service Salt Lake City UT 549 PM MDT Sat Aug 14 2021 UTC053-150015- /O.CON.KSLC.SV.W.0065.000000T0000Z-210815T0015Z/ Washington UT- 549 PM MDT Sat Aug 14 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM MDT FOR NORTHWESTERN WASHINGTON COUNTY... At 548 PM MDT, severe thunderstorms were located along a line extending from 10 miles southeast of Beaver Dam to near Dameron Valley, moving south at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Dameron Valley, Motoqua, Veyo and Goldstrike. This includes Utah Route 18 between mile markers 17 and 31. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3729 11353 3732 11405 3751 11393 3747 11354 TIME...MOT...LOC 2348Z 014DEG 14KT 3739 11393 3738 11364 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Woodward
007
WWUS55 KSLC 150001
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
601 PM MDT Sat Aug 14 2021
UTC053-150010-
/O.CAN.KSLC.SV.W.0065.000000T0000Z-210815T0015Z/
Washington UT-
601 PM MDT Sat Aug 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WASHINGTON COUNTY
IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with these thunderstorms.
LAT...LON 3729 11353 3732 11405 3751 11393 3747 11354
TIME...MOT...LOC 2356Z 014DEG 14KT 3736 11394 3735 11365
$$
WoodwardThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 1:17 PM MDT | Flash Flood Warning | SLC | Emery | 3 hr |
| Aug 14, 3:19 PM MDT | Special Weather Statement | SLC | Iron | 41 min |
| Aug 14, 3:35 PM MDT | Special Weather Statement | SLC | 40 min | |
| Aug 14, 4:47 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
| Aug 14, 5:14 PM MDT | Special Weather Statement | SLC | Washington | 46 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.