Alert archive / California / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 50, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 30, 2021, 1:14 PM PDT for San Bernardino County, California; Mohave County, Arizona. It was in force for 61 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 30, 2021, 1:14 PM PDT (20:14 UTC)
- Expired
- Jul 30, 2021, 2:15 PM PDT
- In force
- 61 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Mohave County, AZ, San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 153 km from the middle of the area, began a volume at 20:15 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
Phoenix, AZ (KPSR), launched 12:00Z, 8.2 hours before the alert went out and 240 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
- 392 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 1882 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
638 WUUS55 KVEF 302014 SVRVEF AZC015-CAC071-302115- /O.NEW.KVEF.SV.W.0050.210730T2014Z-210730T2115Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Las Vegas NV 114 PM PDT Fri Jul 30 2021 The National Weather Service in Las Vegas has issued a * Severe Thunderstorm Warning for... Southwestern Mohave County in northwestern Arizona... Eastern San Bernardino County in southern California... * Until 215 PM PDT/215 PM MST/. * At 114 PM PDT/114 PM MST/, a severe thunderstorm was located near Three Dunes Campground, or 8 miles southeast of Lake Havasu City, moving northwest at 15 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs and trees. * Locations impacted include... Lake Havasu City, Three Dunes Campground, Cattail Cove State Park, Desert Hills and Black Meadow Landing Campground. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3424 11428 3457 11460 3467 11425 3434 11404 TIME...MOT...LOC 2014Z 151DEG 11KT 3440 11424 HAIL...<.75IN WIND...60MPH $$ DSB
2 follow-up statements
911 WWUS55 KVEF 302051 SVSVEF Severe Weather Statement National Weather Service Las Vegas NV 151 PM PDT Fri Jul 30 2021 AZC015-CAC071-302115- /O.CON.KVEF.SV.W.0050.000000T0000Z-210730T2115Z/ Mohave AZ-San Bernardino CA- 151 PM PDT Fri Jul 30 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM PDT/215 PM MST/ FOR SOUTHWESTERN MOHAVE AND EASTERN SAN BERNARDINO COUNTIES... At 149 PM PDT/149 PM MST/, a severe thunderstorm was located over Lake Havasu City, moving northwest at 15 mph. The storm has now collapsed. Severe outflow winds remain possible. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs and trees. Locations impacted include... Lake Havasu City, Three Dunes Campground, Cattail Cove State Park, Desert Hills and Black Meadow Landing Campground. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3424 11428 3457 11460 3467 11425 3434 11404 TIME...MOT...LOC 2049Z 151DEG 11KT 3450 11430 HAIL...<.75IN WIND...60MPH $$ DSB
057
WWUS55 KVEF 302113
SVSVEF
Severe Weather Statement
National Weather Service Las Vegas NV
213 PM PDT Fri Jul 30 2021
AZC015-CAC071-302122-
/O.EXP.KVEF.SV.W.0050.000000T0000Z-210730T2115Z/
Mohave AZ-San Bernardino CA-
213 PM PDT Fri Jul 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MOHAVE AND
EASTERN SAN BERNARDINO COUNTIES WILL EXPIRE AT 215 PM PDT/215 PM
MST/...
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 will be allowed to expire. There is a
favorable environment for aditional storms to form in the area.
LAT...LON 3424 11428 3457 11460 3467 11425 3434 11404
TIME...MOT...LOC 2112Z 151DEG 11KT 3454 11433
$$
DSBThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 2:48 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 30, 2:53 PM PDT | Areal Flood Advisory | VEF | Inyo | 3 hr |
| Jul 30, 3:56 PM PDT | Flash Flood Warning | VEF | Inyo | 5 hr |
| Jul 30, 4:07 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Jul 29, 5:12 PM PDT | Flash Flood Warning | VEF | Mohave | 2 hr |
| Jul 29, 6:04 PM PDT | Severe Thunderstorm Warning | VEF | Mohave | 56 min |
| Jul 30, 12:04 PM PDT | Areal Flood Advisory | VEF | Mohave | 3 hr |
| Jul 30, 12:36 PM PDT | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 30, 2:22 PM PDT | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 30, 4:17 PM PDT | Flash Flood Warning | VEF | Mohave | 3 hr |
Nearby
Severe Thunderstorm Warnings in California, 2021Severe Thunderstorm Warnings in Arizona, 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.