Alert archive / Arizona / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 31, 2023, 5:21 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 39 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 31, 2023, 5:21 PM MST (00:21 UTC)
- Expired
- Jul 31, 2023, 6:00 PM MST
- In force
- 39 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Mohave County, AZ, Clark County, NV
The radar
The Las Vegas radar (KESX), 56 km from the middle of the area, began a volume at 00:21 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 96 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
- 92 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 3195 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
459 WUUS55 KVEF 010021 SVRVEF AZC015-NVC003-010100- /O.NEW.KVEF.SV.W.0021.230801T0021Z-230801T0100Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Las Vegas NV 521 PM PDT Mon Jul 31 2023 The National Weather Service in Las Vegas has issued a * Severe Thunderstorm Warning for... West central Mohave County in northwestern Arizona... East central Clark County in southern Nevada... * Until 600 PM PDT/600 PM MST/. * At 520 PM PDT/520 PM MST/, a severe thunderstorm was located 10 miles east of Callville Bay Campground, or 18 miles east of Las Vegas Bay, moving northeast at 10 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs and trees. * Locations impacted include... Callville Bay and Callville Bay Campground. This includes the following roads... Temple Bar Road between mile markers 13 and 15. State Route 167 in Clark County between mile markers 19 and 35. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. If on or near Lake Mead near Callville Bay and the Virgin Basin, 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 3597 11456 3614 11475 3634 11448 3612 11426 TIME...MOT...LOC 0020Z 227DEG 7KT 3612 11454 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ MW
2 follow-up statements
576 WWUS55 KVEF 010045 SVSVEF Severe Weather Statement National Weather Service Las Vegas NV 545 PM PDT Mon Jul 31 2023 AZC015-NVC003-010100- /O.CON.KVEF.SV.W.0021.000000T0000Z-230801T0100Z/ Mohave AZ-Clark NV- 545 PM PDT Mon Jul 31 2023 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM PDT/600 PM MST/ FOR WEST CENTRAL MOHAVE AND EAST CENTRAL CLARK COUNTIES... At 544 PM PDT/544 PM MST/, a severe thunderstorm was located 11 miles south of Echo Bay Campground, or 20 miles east of Las Vegas Bay, moving northeast at 10 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs and trees. Locations impacted include... Callville Bay and Callville Bay Campground. This includes the following roads... Temple Bar Road between mile markers 13 and 15. State Route 167 in Clark County between mile markers 19 and 35. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. If on or near Lake Mead near Callville Bay and Virgin Basin, get away from the water and move indoors or inside a vehicle. remember, lightning can strike out to 15 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. && LAT...LON 3597 11456 3614 11475 3634 11448 3612 11426 TIME...MOT...LOC 0044Z 227DEG 7KT 3615 11450 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ MW
115
WWUS55 KVEF 010056
SVSVEF
Severe Weather Statement
National Weather Service Las Vegas NV
556 PM PDT Mon Jul 31 2023
AZC015-NVC003-010106-
/O.EXP.KVEF.SV.W.0021.000000T0000Z-230801T0100Z/
Mohave AZ-Clark NV-
556 PM PDT Mon Jul 31 2023
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MOHAVE AND EAST
CENTRAL CLARK COUNTIES WILL EXPIRE AT 600 PM PDT/600 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. However gusty
winds are still possible with this thunderstorm.
LAT...LON 3597 11456 3614 11475 3634 11448 3612 11426
TIME...MOT...LOC 0056Z 227DEG 7KT 3617 11448
$$
MWThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 6:49 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 31, 8:06 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Aug 1, 3:12 PM MST | Flash Flood Warning | VEF | Mohave | 3 hr |
| Jul 31, 10:27 PM MST | Flash Flood Warning | VEF | Clark | 3 hr |
| Aug 1, 1:16 PM MST | Flash Flood Warning | VEF | Clark | 3 hr |
Nearby
Severe Thunderstorm Warnings in Arizona, 2023Severe Thunderstorm Warnings in Nevada, 2023Every severe thunderstorm warning in 2023
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.