Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 71, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 9, 2021, 5:11 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 34 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
- Sep 9, 2021, 5:11 PM MST (00:11 UTC)
- Expired
- Sep 9, 2021, 5:45 PM MST
- In force
- 34 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), 57 km from the middle of the area, began a volume at 00:10 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, 0.2 hours before the alert went out and 151 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
- 662 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 3682 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
810 WUUS55 KVEF 100011 SVRVEF AZC015-NVC003-100100- /O.NEW.KVEF.SV.W.0071.210910T0011Z-210910T0100Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Las Vegas NV 511 PM PDT Thu Sep 9 2021 The National Weather Service in Las Vegas has issued a * Severe Thunderstorm Warning for... Southwestern Mohave County in northwestern Arizona... South central Clark County in southern Nevada... * Until 600 PM PDT/600 PM MST/. * At 510 PM PDT/510 PM MST/, a severe thunderstorm was located over Katherine Landing, moving northwest at 20 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs and trees. * Locations impacted include... Bullhead City, Laughlin, Katherine Landing, Big Bend Rec Area and Cal-Nev-Ari. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. If on or near Lake Mohave, 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 3519 11440 3505 11463 3530 11498 3555 11454 TIME...MOT...LOC 0010Z 139DEG 17KT 3520 11458 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ BKP
2 follow-up statements
307 WWUS55 KVEF 100030 SVSVEF Severe Weather Statement National Weather Service Las Vegas NV 530 PM PDT Thu Sep 9 2021 AZC015-NVC003-100100- /O.CON.KVEF.SV.W.0071.000000T0000Z-210910T0100Z/ Mohave AZ-Clark NV- 530 PM PDT Thu Sep 9 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM PDT/600 PM MST/ FOR SOUTHWESTERN MOHAVE AND SOUTH CENTRAL CLARK COUNTIES... At 529 PM PDT/529 PM MST/, a severe thunderstorm was located near Katherine Landing, moving northwest at 20 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs and trees. Locations impacted include... Bullhead City, Laughlin, Katherine Landing, Big Bend Rec Area and Cal-Nev-Ari. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. If on or near Lake Mohave, get away from the water and move indoors or inside a vehicle. remember, lightning can strike out to 15 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. && LAT...LON 3519 11440 3505 11463 3530 11498 3555 11454 TIME...MOT...LOC 0029Z 139DEG 17KT 3527 11465 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ BKP
974
WWUS55 KVEF 100045
SVSVEF
Severe Weather Statement
National Weather Service Las Vegas NV
545 PM PDT Thu Sep 9 2021
AZC015-NVC003-100054-
/O.CAN.KVEF.SV.W.0071.000000T0000Z-210910T0100Z/
Mohave AZ-Clark NV-
545 PM PDT Thu Sep 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MOHAVE AND SOUTH
CENTRAL CLARK COUNTIES IS CANCELLED...
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 cancelled.
LAT...LON 3519 11440 3505 11463 3530 11498 3555 11454
TIME...MOT...LOC 0041Z 139DEG 17KT 3532 11471
$$
BKPThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 1:48 AM MST | Excessive Heat Warning | VEF | Mohave | 4 days |
| Sep 10, 1:44 PM MST | Severe Thunderstorm Warning | VEF | Clark | 46 min |
| Sep 10, 2:46 PM MST | Severe Thunderstorm Warning | VEF | Clark | 44 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2021Severe Thunderstorm Warnings in Nevada, 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.