Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 23, 2012, 1:54 PM PDT for San Bernardino County, California. It was in force for 66 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 23, 2012, 1:54 PM PDT (20:54 UTC)
- Expired
- Jul 23, 2012, 3:00 PM PDT
- In force
- 66 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
County San Bernardino County, CA
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 8.9 hours before the alert went out and 200 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
- 177 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 2252 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
974
WUUS55 KVEF 232054
SVRVEF
CAC071-232200-
/O.NEW.KVEF.SV.W.0021.120723T2054Z-120723T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
154 PM PDT MON JUL 23 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 300 PM PDT.
* AT 150 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 NEAR
NEWBERRY MOUNTAIN RV PARK...OR 11 MILES EAST OF DAGGETT...AND WAS
MOVING NORTHEAST AT 10 MPH.
* LOCATIONS IMPACTED INCLUDE...
NEWBERRY MOUNTAIN RV PARK.
THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 11 AND 28.
THIS INCLUDES INTERSTATE 15 BETWEEN MILE MARKERS 89 AND 101.
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.
THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL THAT CAN CAUSE INJURY
AND DAMAGE PROPERTY. IN ADDITION...STRONG WINDS AND LIGHTNING ARE
LIKELY. LIGHTNING CAN KILL! TAKE SHELTER IN A STURDY BUILDING. IF IT
IS SAFE TO DO SO...TAKE APPROPRIATE ACTIONS TO PROTECT VEHICLES AND
PROPERTY.
REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER
HASHTAG...NWSVEGAS.
&&
LAT...LON 3476 11666 3476 11672 3485 11684 3505 11666
3486 11641 3474 11664
TIME...MOT...LOC 2053Z 221DEG 8KT 3486 11669
$$
JH2 follow-up statements
084
WWUS55 KVEF 232129
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
229 PM PDT MON JUL 23 2012
CAC071-232200-
/O.CON.KVEF.SV.W.0021.000000T0000Z-120723T2200Z/
SAN BERNARDINO CA-
229 PM PDT MON JUL 23 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM PDT
FOR CENTRAL SAN BERNARDINO COUNTY...
AT 225 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH AND DIME SIZE HAIL.
THIS STORM WAS LOCATED NEAR NEWBERRY MOUNTAIN RV PARK...OR 17 MILES
EAST OF DAGGETT...AND WAS MOVING NORTHEAST AT 10 MPH.
LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF CENTRAL SAN BERNARDINO COUNTY.
THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 20 AND 28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING
DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND
DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN
KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS
UNTIL THE STORM PASSES.
REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER
HASHTAG...NWSVEGAS.
&&
LAT...LON 3486 11673 3501 11660 3486 11641 3485 11643
3476 11660
TIME...MOT...LOC 2128Z 221DEG 8KT 3487 11657
$$
JH419
WWUS55 KVEF 232155
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
255 PM PDT MON JUL 23 2012
CAC071-232204-
/O.EXP.KVEF.SV.W.0021.000000T0000Z-120723T2200Z/
SAN BERNARDINO CA-
255 PM PDT MON JUL 23 2012
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SAN BERNARDINO COUNTY
WILL EXPIRE AT 300 PM PDT...
THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 20 AND 28. THE
THUNDERSTORM HAD WEAKENED AND THE THREAT OF LARGE HAIL AND DAMAGING
WINDS HAS ENDED. THE STORM COULD STILL PRODUCE SMALL HAIL AND WIND
GUSTS TO 40 MPH ALONG WITH HEAVY RAIN.
LAT...LON 3486 11673 3501 11660 3486 11641 3485 11643
3476 11660
TIME...MOT...LOC 2154Z 221DEG 8KT 3491 11652
$$
JHThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 11:17 AM PDT | Areal Flood Advisory | VEF | Inyo | 49 min |
| Jul 23, 11:47 AM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Jul 23, 12:05 PM PDT | Flash Flood Warning | VEF | Inyo | 115 min |
| Jul 23, 12:12 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 48 min |
| Jul 23, 12:18 PM PDT | Flash Flood Warning | VEF | San Bernardino | 117 min |
Nearby
Severe Thunderstorm Warnings in California, 2012Every severe thunderstorm warning in 2012
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.