Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 49, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 29, 2012, 6:38 PM PDT for San Bernardino County, California. It was in force for 52 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, 6:38 PM PDT (01:38 UTC)
- Expired
- Aug 29, 2012, 7:30 PM PDT
- In force
- 52 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
County San Bernardino County, CA
The radar
The San Diego radar (KNKX), 188 km from the middle of the area, began a volume at 01:39 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 00:00Z, 1.6 hours before the alert went out and 208 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
- 2185 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
542
WUUS55 KVEF 300138
SVRVEF
CAC071-300230-
/O.NEW.KVEF.SV.W.0049.120830T0138Z-120830T0230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
638 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 730 PM PDT.
* AT 630 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 OVER
EXTREME SOUTH CENTRAL SAN BERNARDINO COUNTY...OR 26 MILES EAST OF
TWENTYNINE PALMS. THIS STORM WAS NEARLY STATIONARY.
* LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF EXTREME SOUTHERN SAN BERNARDINO COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3416 11572 3419 11545 3411 11545 3412 11553
3407 11555 3409 11560 3403 11560 3403 11571
TIME...MOT...LOC 0138Z 270DEG 1KT 3407 11561
$$
ASG2 follow-up statements
391
WWUS55 KVEF 300159
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
659 PM PDT WED AUG 29 2012
CAC071-300230-
/O.CON.KVEF.SV.W.0049.000000T0000Z-120830T0230Z/
SAN BERNARDINO CA-
659 PM PDT WED AUG 29 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM PDT
FOR SOUTH CENTRAL SAN BERNARDINO COUNTY...
AT 651 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED OVER EXTREME SOUTH CENTRAL SAN BERNARDINO COUNTY...OR 27
MILES EAST OF TWENTYNINE PALMS ALONG HIGHWAY 62. THIS STORM WAS
NEARLY STATIONARY.
LOCATIONS IMPACTED INCLUDE...
MAINLY RURAL AREAS OF EXTREME SOUTHERN SAN BERNARDINO COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL THAT CAN CAUSE INJURY
AND DAMAGE PROPERTY. IN ADDITION...STRONG WINDS AND LIGHTNING ARE
LIKELY. LIGHTNING CAN KILL! TAKE SHELTER IN A STURDY BUILDING. IF IT
IS SAFE TO DO SO...TAKE APPROPRIATE ACTIONS TO PROTECT VEHICLES AND
PROPERTY.
REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS
NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER
HASHTAG...NWSVEGAS.
&&
LAT...LON 3416 11572 3419 11545 3411 11545 3412 11553
3407 11555 3409 11560 3403 11560 3403 11571
TIME...MOT...LOC 0159Z 270DEG 1KT 3407 11560
$$
ASG576
WWUS55 KVEF 300224
SVSVEF
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
724 PM PDT WED AUG 29 2012
CAC071-300232-
/O.EXP.KVEF.SV.W.0049.000000T0000Z-120830T0230Z/
SAN BERNARDINO CA-
724 PM PDT WED AUG 29 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SAN BERNARDINO
COUNTY WILL EXPIRE AT 730 PM PDT...
THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS TRACKED
SOUTHEAST AND HAS WEAKENED. THEREFORE THE WARNING HAS BEEN ALLOWED
TO EXPIRE.
LAT...LON 3416 11572 3419 11545 3411 11545 3412 11553
3407 11555 3409 11560 3403 11560 3403 11571
TIME...MOT...LOC 0222Z 270DEG 1KT 3407 11559
$$
ASGThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 5:48 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 87 min |
| Aug 30, 2:23 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 30, 4:28 PM PDT | Flash Flood Warning | VEF | San Bernardino | 89 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.