Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 18, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Aug 16, 2012, 3:09 PM PDT for Riverside County, San Bernardino County, California. It was in force for 34 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 16, 2012, 3:09 PM PDT (22:09 UTC)
- Expired
- Aug 16, 2012, 3:43 PM PDT
- In force
- 34 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
The nearest sounding before it
Edwards AFB, CA (KEDW), launched 12:00Z, 10.2 hours before the alert went out and 105 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
- 3049 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- -7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
523 WUUS56 KSGX 162209 SVRSGX CAC065-071-162300- /O.NEW.KSGX.SV.W.0018.120816T2209Z-120816T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 309 PM PDT THU AUG 16 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA... THIS INCLUDES THE CITY OF MORENO VALLEY... SOUTHWESTERN SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA... THIS INCLUDES THE CITIES OF...SAN BERNARDINO...RIALTO...REDLANDS... * UNTIL 400 PM PDT * AT 300 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 NEAR LOMA LINDA...OR NEAR REDLANDS...AND MOVING NORTHWEST AT 5 MPH...APPROACHING INTERSTATES 215 AND 10. && LAT...LON 3401 11749 3420 11735 3405 11711 3390 11722 TIME...MOT...LOC 2208Z 121DEG 5KT 3402 11726 $$ PALMER
2 follow-up statements
845 WWUS56 KSGX 162230 SVSSGX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 330 PM PDT THU AUG 16 2012 CAC065-071-162300- /O.CON.KSGX.SV.W.0018.000000T0000Z-120816T2300Z/ RIVERSIDE CA-SAN BERNARDINO CA- 330 PM PDT THU AUG 16 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM PDT FOR SOUTHWESTERN SAN BERNARDINO AND NORTHWESTERN RIVERSIDE COUNTIES... AT 324 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR GRAND TERRACE...OR 7 MILES WEST OF REDLANDS...MOVING NORTHWEST AT 5 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HIGHGROVE...COLTON...SUNNYSLOPE...SAN BERNARDINO...RUBIDOUX... RIALTO...MUSCOY AND BLOOMINGTON LAT...LON 3401 11749 3420 11735 3405 11711 3390 11722 TIME...MOT...LOC 2229Z 121DEG 5KT 3403 11729 $$ PALMER
487 WWUS56 KSGX 162243 SVSSGX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 343 PM PDT THU AUG 16 2012 CAC065-071-162253- /O.CAN.KSGX.SV.W.0018.000000T0000Z-120816T2300Z/ RIVERSIDE CA-SAN BERNARDINO CA- 343 PM PDT THU AUG 16 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SAN BERNARDINO AND NORTHWESTERN RIVERSIDE COUNTIES IS CANCELLED... THIS THUNDERSTORM HAS SIGNIFICANTLY WEAKEN OVER THE PAST 10 MINUTES...WITH JUST LIGHT TO MODERATE RAIN POSSIBLE. THEREFORE...THE SEVERE THUNDERSTORM WARNING IS CANCELLED. LAT...LON 3401 11749 3420 11735 3405 11711 3390 11722 TIME...MOT...LOC 2243Z 121DEG 5KT 3404 11731 $$ PALMER
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 12:16 PM PDT | Flash Flood Warning | SGX | San Diego | 94 min |
| Aug 16, 12:36 PM PDT | Special Weather Statement | SGX | San Diego | 54 min |
| Aug 16, 12:43 PM PDT | Special Weather Statement | SGX | San Diego | 62 min |
| Aug 16, 12:45 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 30 min |
| Aug 16, 1:13 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 32 min |
| Aug 16, 1:16 PM PDT | Flash Flood Warning | SGX | San Diego | 91 min |
| Aug 16, 1:41 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 49 min |
| Aug 16, 3:13 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 54 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.