Alert archive / California / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 79, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 6, 2011, 12:04 AM PDT for San Bernardino County, California; Mohave County, Arizona; Clark County, Nevada. It was in force for 41 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 6, 2011, 12:04 AM PDT (07:04 UTC)
- Expired
- Jul 6, 2011, 12:45 AM PDT
- In force
- 41 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
Counties Mohave County, AZ, San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 74 km from the middle of the area, began a volume at 07:06 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 12:08 AM PDT | TSTM WND GST 64 | Needles Airport, CA | |
| Jul 6, 12:15 AM PDT | TSTM WND DMG | 2 Nne Needles, CA | A SPOTTER REPORTED IN NEEDLES THAT POWER WAS OUT AND TRANSFORMERS WERE KNOCKED OUT BY THE WIND. TREE BRANCHES WERE ALSO DOWN AND SHINGLES WERE BLOWN OFF ROOFS. IN ADDITION THE AWNING OF A GAS STATION WAS SWAYING IN THE WIND. VISIBILITY WAS REDUCED TO LESS THAN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 7.1 hours before the alert went out and 167 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
- 2968 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
614
WUUS55 KVEF 060704
SVRVEF
AZC015-CAC071-NVC003-060745-
/O.NEW.KVEF.SV.W.0079.110706T0704Z-110706T0745Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1204 AM PDT WED JUL 6 2011
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WEST CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA...
EAST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
SOUTH CENTRAL CLARK COUNTY IN SOUTHERN NEVADA...
* UNTIL 1245 AM PDT/1245 AM MST/.
* JUST BEFORE MIDNIGHT MST/MIDNIGHT PDT/...THE NEEDLES AIRPORT
REPORTED A 67 MPH WIND GUST. A LINE OF SEVERE THUNDERSTORMS
CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 9 MILES NORTHWEST
OF GOLDEN VALLEY TO 20 MILES WEST OF HIGHWAY 95 AND I-40...OR
ALONG A LINE EXTENDING FROM 14 MILES NORTHEAST OF BULLHEAD CITY TO
25 MILES EAST OF MITCHELL CAVERNS...AND MOVING NORTHWEST AT 95 MPH.
* LOCATIONS IMPACTED INCLUDE...BIG BEND RAWS...CAL NEV ARI...
LAUGHLIN...NEEDLES...BULLHEAD CITY...GOLDEN VALLEY...MOHAVE
VALLEY...OATMAN...TOPOCK...WILLOW VALLEY...YUCCA...RIVERSIDE
ADVENTURE RV PARK...HIGHWAY 95 AND I-40...NEEDLES KOA CAMPGROUND
AND BIG BEND REC AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING
DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND
DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN
KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS
UNTIL THE STORM PASSES. IN SOME CASES...STRONG WINDS WILL OCCUR WELL
AHEAD OF ANY RAIN OR LIGHTNING.
REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
THIS STORM WILL AFFECT LAKE HAVASU. IF POSSIBLE...GET OUT OF THE
WATER AND SEEK SHELTER. IF OUT IN OPEN WATERS...HEAD TO SHORE IF
THERE IS TIME...OTHERWISE DROP ANCHOR AND TAKE SHELTER IN THE BOAT
CABIN. STAY AWAY FROM METAL AND ALL ELECTRICAL COMPONENTS. LIGHTNING
KILLS! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.
&&
LAT...LON 3523 11417 3483 11403 3457 11504 3498 11533
3533 11491 3545 11445
TIME...MOT...LOC 0702Z 147DEG 83KT 3532 11439 3492 11515
$$
STACHELSKI2 follow-up statements
737
WWUS55 KVEF 060720
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1220 AM PDT WED JUL 6 2011
AZC015-CAC071-NVC003-060745-
/O.CON.KVEF.SV.W.0079.000000T0000Z-110706T0745Z/
MOHAVE AZ-SAN BERNARDINO CA-CLARK NV-
1220 AM PDT WED JUL 6 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM
PDT/1245 AM MST/ FOR SOUTH CENTRAL CLARK...EAST CENTRAL SAN
BERNARDINO AND WEST CENTRAL MOHAVE COUNTIES...
AT 1211 AM MST/1211 AM PDT/...A LINE OF SEVERE THUNDERSTORMS WAS
REPORTED CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 9 MILES
NORTHWEST OF GOLDEN VALLEY TO 20 MILES WEST OF HIGHWAY 95 AND
I-40...OR ALONG A LINE EXTENDING FROM 14 MILES NORTHEAST OF BULLHEAD
CITY TO 25 MILES EAST OF MITCHELL CAVERNS...AND MOVING NORTHWEST AT
20 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING
DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND
DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN
KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS
UNTIL THE STORM PASSES.
REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.
THIS STORM WILL AFFECT LAKE HAVASU. IF POSSIBLE...GET OUT OF THE
WATER AND SEEK SHELTER. IF OUT IN OPEN WATERS...HEAD TO SHORE IF
THERE IS TIME...OTHERWISE DROP ANCHOR AND TAKE SHELTER IN THE BOAT
CABIN. STAY AWAY FROM METAL AND ALL ELECTRICAL COMPONENTS. LIGHTNING
KILLS! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.
&&
LAT...LON 3523 11417 3483 11403 3457 11504 3498 11533
3533 11491 3545 11445
TIME...MOT...LOC 0719Z 147DEG 83KT 3564 11467 3524 11543
$$
JENSEN253
WWUS55 KVEF 060744
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1244 AM PDT WED JUL 6 2011
AZC015-CAC071-NVC003-060751-
/O.EXP.KVEF.SV.W.0079.000000T0000Z-110706T0745Z/
MOHAVE AZ-SAN BERNARDINO CA-CLARK NV-
1244 AM PDT WED JUL 6 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CLARK...EAST
CENTRAL SAN BERNARDINO AND WEST CENTRAL MOHAVE COUNTIES WILL EXPIRE
AT 1245 AM PDT/1245 AM MST/...
ALTHOUGH A CLUSTER OF THUNDERSTORMS CONTINUES TO AFFECT SOUTHERN
CLARK COUNTY...SOUTH CENTRAL MOHAVE COUNTY AND EAST CENTRAL SAN
BERNARDINO COUNTY...SPOTTERS HAVE MAINLY REPORTED WIND GUSTS AROUND
50 MPH IN THE LAST TWENTY MINUTES IN ASSOCIATION WITH THIS ACTIVITY.
THEREFORE WHILE GUSTY WINDS WILL STILL BE POSSIBLE WITH THIS
THUNDERSTORM ACTIVITY...WINDS SHOULD REMAIN BELOW THE SEVERE
THUNDERSTORM THRESHOLD OF 58 MPH. THUS THE WARNING WILL BE ALLOWED
TO EXPIRE.
LAT...LON 3523 11417 3483 11403 3457 11504 3498 11533
3533 11491 3545 11445
TIME...MOT...LOC 0741Z 147DEG 83KT 3606 11502 3566 11578
$$
STACHELSKIThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 11:19 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 76 min |
| Jul 5, 11:49 PM PDT | Flash Flood Warning | VEF | San Bernardino | 116 min |
| Jul 6, 12:15 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 6, 4:40 AM PDT | Flash Flood Watch | VEF | Inyo, San Bernardino | 17 hr |
| Jul 6, 12:14 PM PDT | Areal Flood Advisory | VEF | Inyo | 2 hr |
| Jul 6, 12:31 PM PDT | Areal Flood Advisory | VEF | Inyo | 119 min |
| Jul 6, 1:12 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 6, 1:29 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 6, 4:07 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 6, 4:12 PM PDT | Flash Flood Warning | VEF | Inyo | 3 hr |
| Jul 6, 4:55 PM PDT | Flash Flood Warning | VEF | Inyo | 2 hr |
| Jul 5, 6:18 PM PDT | Flash Flood Warning | VEF | Mohave | 50 min |
| Jul 5, 6:23 PM PDT | Flash Flood Warning | VEF | Mohave | 82 min |
| Jul 6, 1:39 PM PDT | Flash Flood Warning | VEF | Mohave | 39 min |
| Jul 5, 8:45 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 2 hr |
| Jul 6, 10:58 AM PDT | Areal Flood Advisory | VEF | Clark, Nye | 66 min |
| Jul 6, 12:25 PM PDT | Areal Flood Advisory | VEF | Esmeralda, Lincoln, Nye | 3 hr |
| Jul 6, 12:49 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 26 min |
| Jul 6, 1:01 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 21 min |
| Jul 6, 1:19 PM PDT | Flash Flood Warning | VEF | Clark | 80 min |
| Jul 6, 2:05 PM PDT | Areal Flood Advisory | VEF | Lincoln | 3 hr |
| Jul 6, 3:10 PM PDT | Areal Flood Advisory | VEF | Lincoln | 2 hr |
| Jul 6, 3:26 PM PDT | Areal Flood Advisory | VEF | Esmeralda, Lincoln, Nye | 2 hr |
Nearby
Severe Thunderstorm Warnings in California, 2011Severe Thunderstorm Warnings in Arizona, 2011Severe Thunderstorm Warnings in Nevada, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.