Alert archive / California / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 4, 2007, 5:00 PM PDT for San Bernardino County, California; Mohave County, Arizona. It was in force for 45 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 4, 2007, 5:00 PM PDT (00:00 UTC)
- Expired
- Sep 4, 2007, 5:45 PM PDT
- In force
- 45 min
- Issued by
- NWS Las Vegas, NV
- Area
- Counties, with a storm outline in the text
Counties Mohave County, AZ, San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 113 km from the middle of the area, began a volume at 00:01 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
Mercury/Desert R, NV (KDRA), launched 00:00Z, 0.0 hours before the alert went out and 247 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 4610 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KVEF 050001 SVRVEF AZC015-CAC071-050045- /O.NEW.KVEF.SV.W.0021.070905T0000Z-070905T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 500 PM MST TUE SEP 4 2007 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN MOHAVE COUNTY IN NORTHWEST ARIZONA... EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA... * UNTIL 545 PM MST(545 PM PDT). * AT 450 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 13 MILES SOUTH OF NEEDLES...OR ABOUT 14 MILES WEST OF TOPOCK...AND WAS MOVING NORTHEAST AT 8 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... NEEDLES AND TOPOCK AROUND 530 PM MST... LAT...LON 3458 11486 3446 11465 3487 11415 3509 11446 $$ JJ
1 follow-up statement
000 WWUS55 KVEF 050018 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 516 PM PDT TUE SEP 4 2007 AZC015-CAC071-050045- /O.CON.KVEF.SV.W.0021.000000T0000Z-070905T0045Z/ MOHAVE AZ-SAN BERNARDINO CA- 516 PM MST TUE SEP 4 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MST(545 PM PDT) FOR EAST CENTRAL SAN BERNARDINO AND SOUTHWESTERN MOHAVE COUNTIES... AT 507 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 8 MILES SOUTHWEST OF NEEDLES...MOVING EAST NORTHEAST AT 8 MPH. THIS SEVERE THUNDERSTORM WAS CROSSING HIGHWAY 95 SOUTH OF NEEDLES AT 507 PM AND SHOULD REACH INTERSTATE 40 BY 530 PM AND THE TOWN OF TOPOCK AT 530 PM AS WELL. LAT...LON 3458 11486 3446 11465 3487 11415 3509 11446 $$ JJ
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 5:40 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 26 min |
Nearby
Severe Thunderstorm Warnings in California, 2007Severe Thunderstorm Warnings in Arizona, 2007Every severe thunderstorm warning in 2007
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.