Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 4, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Jul 15, 2012, 4:16 PM PDT for San Bernardino County, California. It was in force for 44 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 15, 2012, 4:16 PM PDT (23:16 UTC)
- Expired
- Jul 15, 2012, 5:00 PM PDT
- In force
- 44 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
County San Bernardino County, CA
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 11.3 hours before the alert went out and 215 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
- 335 J/kg
- Mixed-layer CIN
- -212 J/kg
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
789 WUUS56 KSGX 152316 SVRSGX CAC071-160000- /O.NEW.KSGX.SV.W.0004.120715T2316Z-120716T0000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 416 PM PDT SUN JUL 15 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... * UNTIL 500 PM PDT. * AT 406 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED OVER CENTRAL SAN BERNARDINO COUNTY...OR 14 MILES SOUTHEAST OF DAGGETT AND SOUTH OF HIGHWAY 40. THIS STORM WAS MOVING NORTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE NEAR DAGGETT ALONG INTERSTATE 15. && LAT...LON 3476 11680 3474 11650 3460 11651 3454 11675 TIME...MOT...LOC 2313Z 168DEG 2KT 3474 11669 $$ PG
2 follow-up statements
925 WWUS56 KSGX 152334 SVSSGX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 434 PM PDT SUN JUL 15 2012 CAC071-160000- /O.CON.KSGX.SV.W.0004.000000T0000Z-120716T0000Z/ SAN BERNARDINO CA- 434 PM PDT SUN JUL 15 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM PDT FOR CENTRAL SAN BERNARDINO COUNTY... AT 429 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND GUSTY SURFACE WINDS. THIS STORM WAS LOCATED OVER CENTRAL SAN BERNARDINO COUNTY...OR 23 MILES SOUTHEAST OF DAGGETT...MOVING NORTHEAST AT 15 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 3476 11674 3474 11650 3460 11651 3455 11672 TIME...MOT...LOC 2334Z 235DEG 15KT 3464 11658 $$ JJT/PG
023 WWUS56 KSGX 152354 SVSSGX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 454 PM PDT SUN JUL 15 2012 CAC071-160003- /O.EXP.KSGX.SV.W.0004.000000T0000Z-120716T0000Z/ SAN BERNARDINO CA- 454 PM PDT SUN JUL 15 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SAN BERNARDINO COUNTY WILL EXPIRE AT 500 PM PDT... THE THUNDERSTORM IS NO LONGER SEVERE...THEREFORE THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE AT 500 PM PDT. LAT...LON 3476 11674 3474 11650 3460 11651 3455 11672 TIME...MOT...LOC 2353Z 234DEG 13KT 3468 11652 $$ JJT/PALMER
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 5:30 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 45 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.