Alert archive / California / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 13, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Aug 28, 2011, 2:14 PM PDT for San Diego County, California. It was in force for 31 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 28, 2011, 2:14 PM PDT (21:14 UTC)
- Expired
- Aug 28, 2011, 2:45 PM PDT
- In force
- 31 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
County San Diego County, CA
The radar
The San Diego radar (KNKX), 55 km from the middle of the area, began a volume at 21:14 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 28, 2:20 PM PDT | TSTM WND GST 56 | 4 Sse Warner Springs, CA | SDGE EWNSD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.2 hours before the alert went out and 75 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
- 19 J/kg
- Mixed-layer CIN
- -740 J/kg
- Mixed-layer LCL
- 2184 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
262
WUUS56 KSGX 282114
SVRSGX
CAC073-282145-
/O.NEW.KSGX.SV.W.0013.110828T2114Z-110828T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
214 PM PDT SUN AUG 28 2011
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
* UNTIL 245 PM PDT
* AT 206 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 NEAR
WARNER SPRINGS...OR 14 MILES WEST OF BORREGO SPRINGS. THIS STORM WAS
NEARLY STATIONARY.
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 3317 11650 3313 11661 3323 11669 3330 11666
3333 11659 3331 11652
TIME...MOT...LOC 2112Z 081DEG 0KT 3325 11659
$$
MOKER/SMALL2 follow-up statements
547
WWUS56 KSGX 282137
SVSSGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
237 PM PDT SUN AUG 28 2011
CAC073-282145-
/O.CON.KSGX.SV.W.0013.000000T0000Z-110828T2145Z/
SAN DIEGO CA-
237 PM PDT SUN AUG 28 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM PDT
FOR NORTH CENTRAL SAN DIEGO COUNTY...
AT 230 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR WARNER SPRINGS...OR 14 MILES WEST OF BORREGO SPRINGS.
THIS STORM WAS NEARLY STATIONARY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
&&
LAT...LON 3317 11650 3313 11661 3323 11669 3330 11666
3333 11659 3331 11652
TIME...MOT...LOC 2136Z 081DEG 0KT 3325 11659
$$
MOKER/SMALL661
WWUS56 KSGX 282141
SVSSGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
241 PM PDT SUN AUG 28 2011
CAC073-282150-
/O.EXP.KSGX.SV.W.0013.000000T0000Z-110828T2145Z/
SAN DIEGO CA-
241 PM PDT SUN AUG 28 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SAN DIEGO COUNTY
WILL EXPIRE AT 245 PM PDT...
LAT...LON 3317 11650 3313 11661 3323 11669 3330 11666
3333 11659 3331 11652
TIME...MOT...LOC 2140Z 081DEG 0KT 3325 11659
$$
MOKER/SMALLThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 11:30 PM PDT | Dust Storm Warning | SGX | Riverside, San Diego | 3 hr |
| Aug 28, 11:29 AM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 7 hr |
| Aug 28, 1:39 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 81 min |
| Aug 28, 1:46 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 29 min |
| Aug 28, 3:01 PM PDT | Flash Flood Warning | SGX | San Bernardino | 89 min |
| Aug 28, 3:11 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 34 min |
| Aug 28, 3:33 PM PDT | Flash Flood Warning | SGX | San Bernardino | 73 min |
| Aug 28, 3:47 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 66 min |
| Aug 28, 4:32 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 79 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.