Alert archive / Utah / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 9, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 29, 2021, 4:03 PM MDT for Kane County, San Juan County, Utah. It was in force for 27 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
- Jun 29, 2021, 4:03 PM MDT (22:03 UTC)
- Expired
- Jun 29, 2021, 4:30 PM MDT
- In force
- 27 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kane County, UT, San Juan County, UT
The radar
The Cedar City radar (KICX), 136 km from the middle of the area, began a volume at 22:05 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.1 hours before the alert went out and 209 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
- 225 J/kg
- Mixed-layer CIN
- -162 J/kg
- Mixed-layer LCL
- 1570 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -75 m²/s²
- 0-3 km storm-relative helicity
- -28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
451 WUUS55 KSLC 292203 SVRSLC UTC025-037-292230- /O.NEW.KSLC.SV.W.0009.210629T2203Z-210629T2230Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Salt Lake City UT 403 PM MDT Tue Jun 29 2021 The National Weather Service in Salt Lake City has issued a * Severe Thunderstorm Warning for... Southwestern San Juan County in southeastern Utah... South central Kane County in southern Utah... * Until 430 PM MDT * At 403 PM MDT, a severe thunderstorm was located near Lake Powell, or 14 miles northeast of Page, moving south at 10 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Big Water and Lake Powell. This includes US Route 89 between mile markers 0 and 5. 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. If on or near Lake Powell, get away from the water and move indoors or inside a vehicle. Remember, lightning can strike out to 15 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. && LAT...LON 3712 11165 3719 11124 3700 11116 3700 11163 TIME...MOT...LOC 2203Z 339DEG 9KT 3709 11135 HAIL...<.75IN WIND...60MPH $$ MPS
2 follow-up statements
657 WWUS55 KSLC 292218 SVSSLC Severe Weather Statement National Weather Service Salt Lake City UT 418 PM MDT Tue Jun 29 2021 UTC025-037-292230- /O.CON.KSLC.SV.W.0009.000000T0000Z-210629T2230Z/ San Juan UT-Kane UT- 418 PM MDT Tue Jun 29 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR SOUTHWESTERN SAN JUAN AND SOUTH CENTRAL KANE COUNTIES... At 418 PM MDT, severe thunderstorms were located along a line extending from Lake Powell to near Big Water, moving south at 20 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Big Water and Lake Powell. This includes US Route 89 between mile markers 0 and 5. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with these storms. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. If on or near Lake Powell, get away from the water and move indoors or inside a vehicle. remember, lightning can strike out to 15 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. && LAT...LON 3712 11165 3719 11124 3700 11116 3700 11163 TIME...MOT...LOC 2218Z 349DEG 18KT 3705 11130 3704 11159 HAIL...<.75IN WIND...60MPH $$ MPS
724
WWUS55 KSLC 292230
SVSSLC
Severe Weather Statement
National Weather Service Salt Lake City UT
430 PM MDT Tue Jun 29 2021
UTC025-037-292239-
/O.EXP.KSLC.SV.W.0009.000000T0000Z-210629T2230Z/
San Juan UT-Kane UT-
430 PM MDT Tue Jun 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SAN JUAN AND
SOUTH CENTRAL KANE COUNTIES WILL EXPIRE AT 430 PM MDT...
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 will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
LAT...LON 3712 11165 3719 11124 3700 11116 3700 11163
TIME...MOT...LOC 2229Z 339DEG 9KT 3703 11129 3702 11158
$$
MPSThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 1:53 PM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
| Jun 29, 2:11 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
| Jun 29, 2:14 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Jun 29, 3:09 PM MDT | Special Weather Statement | SLC | 36 min | |
| Jun 29, 4:40 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
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.