Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 48, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 29, 2012, 3:23 PM PDT for San Bernardino County, California. It was in force for 37 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
- Aug 29, 2012, 3:23 PM PDT (22:23 UTC)
- Expired
- Aug 29, 2012, 4:00 PM PDT
- In force
- 37 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
County San Bernardino County, CA
The radar
The Santa Ana Mts radar (KSOX), 131 km from the middle of the area, began a volume at 22:24 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
San Diego, CA (KNKX), launched 12:00Z, 10.4 hours before the alert went out and 192 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
- 50 J/kg
- Mixed-layer CIN
- -642 J/kg
- Mixed-layer LCL
- 1726 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
431
WUUS55 KVEF 292223
SVRVEF
CAC071-292300-
/O.NEW.KVEF.SV.W.0048.120829T2223Z-120829T2300Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
323 PM PDT WED AUG 29 2012
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 400 PM PDT.
* AT 319 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED OVER SOUTH CENTRAL SAN
BERNARDINO COUNTY...OR 23 MILES NORTHWEST OF TWENTYNINE PALMS...AND
WAS MOVING NORTH AT 10 MPH.
* LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF SOUTHERN SAN BERNARDINO COUNTY.
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 3424 11644 3432 11647 3438 11640 3446 11640
3447 11642 3450 11642 3451 11641 3452 11629
3425 11628
TIME...MOT...LOC 2223Z 173DEG 7KT 3433 11640
$$
PIERCE2 follow-up statements
098
WWUS55 KVEF 292241
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
341 PM PDT WED AUG 29 2012
CAC071-292300-
/O.CON.KVEF.SV.W.0048.000000T0000Z-120829T2300Z/
SAN BERNARDINO CA-
341 PM PDT WED AUG 29 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM PDT
FOR SOUTH CENTRAL SAN BERNARDINO COUNTY...
AT 336 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER SOUTH CENTRAL SAN
BERNARDINO COUNTY...OR 22 MILES NORTHWEST OF TWENTYNINE PALMS...AND
WAS MOVING NORTH AT 5 MPH.
LOCATIONS IMPACTED INCLUDE...LANDERS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS WHICH CAN BRING
DOWN TREES AND POWER LINES AND CAUSE SIGNIFICANT BLOWING DUST AND
DEBRIS. IN ADDITION...HAIL AND LIGHTNING ARE LIKELY. LIGHTNING CAN
KILL! TAKE COVER IN A SUBSTANTIAL SHELTER AND STAY AWAY FROM WINDOWS
UNTIL THE STORM PASSES.
REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER
HASHTAG...NWSVEGAS.
&&
LAT...LON 3424 11644 3432 11647 3438 11640 3446 11640
3447 11642 3450 11642 3451 11641 3452 11629
3425 11628
TIME...MOT...LOC 2240Z 167DEG 6KT 3429 11642
$$
PIERCE332
WWUS55 KVEF 292300
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
400 PM PDT WED AUG 29 2012
CAC071-292308-
/O.EXP.KVEF.SV.W.0048.000000T0000Z-120829T2300Z/
SAN BERNARDINO CA-
400 PM PDT WED AUG 29 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SAN BERNARDINO
COUNTY WILL EXPIRE AT 400 PM PDT...
THE THUNDERSTORM NEAR LANDERS IS WEAKENING. THE THREAT FOR STRONG
WINDS OR HAIL HAS DIMINISHED. THE SEVERE THUNDERSTORM WARNING WILL
EXPIRE AT 4 PM.
LAT...LON 3424 11644 3432 11647 3438 11640 3446 11640
3447 11642 3450 11642 3451 11641 3452 11629
3425 11628
TIME...MOT...LOC 2258Z 167DEG 6KT 3432 11643
$$
PIERCEThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 1:26 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 34 min |
| Aug 29, 3:38 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 82 min |
| Aug 29, 4:19 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 116 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; radar from the NEXRAD Level II archive.