Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 20, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Jul 23, 2012, 12:12 PM PDT for San Bernardino County, California. It was in force for 48 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, 12:12 PM PDT (19:12 UTC)
- Expired
- Jul 23, 2012, 1:00 PM PDT
- In force
- 48 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
County San Bernardino County, CA
The radar
The Las Vegas radar (KESX), 80 km from the middle of the area, began a volume at 19:15 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
Las Vegas, NV (KVEF), launched 12:00Z, 7.2 hours before the alert went out and 82 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.
326 WUUS55 KVEF 231912 SVRVEF CAC071-232000- /O.NEW.KVEF.SV.W.0020.120723T1912Z-120723T2000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1212 PM PDT MON JUL 23 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 100 PM PDT. * AT 1207 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 NORTH CENTRAL SAN BERNARDINO COUNTY...OR 19 MILES WEST OF PRIMM... AND WAS MOVING NORTH AT 5 MPH. * LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF NORTHERN SAN BERNARDINO COUNTY INCLUDING KINGSTON AND EXCELSIOR MINE ROAD. 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 3574 11591 3576 11562 3555 11561 3553 11584 TIME...MOT...LOC 1911Z 174DEG 4KT 3562 11574 $$ JH
2 follow-up statements
754 WWUS55 KVEF 231945 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1245 PM PDT MON JUL 23 2012 CAC071-232000- /O.CON.KVEF.SV.W.0020.000000T0000Z-120723T2000Z/ SAN BERNARDINO CA- 1245 PM PDT MON JUL 23 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM PDT FOR NORTHEAST SAN BERNARDINO COUNTY... AT 1241 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER NORTH CENTRAL SAN BERNARDINO COUNTY...OR 20 MILES WEST OF PRIMM...AND WAS MOVING NORTH AT 5 MPH. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF NORTHERN SAN BERNARDINO COUNTY INCLUDING KINGSTON AND EXCELSIOR MINE ROAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL THAT CAN CAUSE INJURY AND DAMAGE PROPERTY. IN ADDITION...STRONG WINDS AND LIGHTNING ARE LIKELY. LIGHTNING CAN KILL! TAKE SHELTER IN A STURDY BUILDING. IF IT IS SAFE TO DO SO...TAKE APPROPRIATE ACTIONS TO PROTECT VEHICLES AND PROPERTY. REPORT SEVERE WEATHER BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG...NWSVEGAS. && LAT...LON 3574 11591 3576 11562 3555 11561 3553 11584 TIME...MOT...LOC 1945Z 174DEG 4KT 3566 11574 $$ JH
999 WWUS55 KVEF 231954 SVSVEF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 1254 PM PDT MON JUL 23 2012 CAC071-232003- /O.EXP.KVEF.SV.W.0020.000000T0000Z-120723T2000Z/ SAN BERNARDINO CA- 1254 PM PDT MON JUL 23 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEAST SAN BERNARDINO COUNTY HAS EXPIRED... THE STORM HAS WEAKENED AND LARGE HAIL AND DAMAGING WINDS ARE NO LONGER A THREAT WITH THIS STORM. HEAVY RAIN WILL CONTINUE. LAT...LON 3574 11591 3576 11562 3555 11561 3553 11584 TIME...MOT...LOC 1953Z 174DEG 4KT 3567 11574 $$ JH
The 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, 12:18 PM PDT | Flash Flood Warning | VEF | San Bernardino | 117 min |
| Jul 23, 1:54 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 66 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.