Alert archive / California / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 7, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Jul 30, 2011, 2:13 PM PDT for San Bernardino County, California. It was in force for 32 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 30, 2011, 2:13 PM PDT (21:13 UTC)
- Expired
- Jul 30, 2011, 2:45 PM PDT
- In force
- 32 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
County San Bernardino County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.2 hours before the alert went out and 218 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
- 657 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
865
WUUS56 KSGX 302113
SVRSGX
CAC071-302145-
/O.NEW.KSGX.SV.W.0007.110730T2113Z-110730T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
213 PM PDT SAT JUL 30 2011
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WEST CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA...
* UNTIL 245 PM PDT
* AT 200 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 HELENDALE...OR 11 MILES
NORTH OF APPLE VALLEY...AND MOVING NORTHWEST AT 10 MPH. THIS STORM
HAS A HISTORY OF WINDS NEAR 60 MPH AND HALF INCH HAIL.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
HELENDALE BY 235 PM PDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
&&
LAT...LON 3482 11759 3480 11721 3479 11718 3471 11714
3457 11728 3462 11751 3482 11767 3483 11766
TIME...MOT...LOC 2112Z 129DEG 7KT 3470 11729
$$
TARDY1 follow-up statement
123
WWUS56 KSGX 302146
SVSSGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
246 PM PDT SAT JUL 30 2011
CAC071-302156-
/O.EXP.KSGX.SV.W.0007.000000T0000Z-110730T2145Z/
SAN BERNARDINO CA-
246 PM PDT SAT JUL 30 2011
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL SAN BERNARDINO
COUNTY HAS EXPIRED...
THE SEVERE THUNDERSTORM HAS MOVED JUST NORTH OF HELENDALE.
LAT...LON 3482 11759 3480 11721 3479 11718 3471 11714
3457 11728 3462 11751 3482 11767 3483 11766
TIME...MOT...LOC 2113Z 129DEG 7KT 3470 11729
$$
TARDYThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 2:53 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 17 hr |
| Jul 30, 12:33 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Jul 30, 12:58 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 32 min |
| Jul 30, 1:26 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 2 hr |
| Jul 30, 1:39 PM PDT | Flash Flood Warning | SGX | San Bernardino | 96 min |
| Jul 30, 1:41 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 49 min |
| Jul 30, 2:30 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Jul 30, 3:34 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 116 min |
| Jul 30, 3:46 PM PDT | Areal Flood Advisory | SGX | San Diego | 119 min |
Nearby
Severe Thunderstorm Warnings in California, 2011Every severe thunderstorm warning in 2011
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.