Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 28, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Sep 9, 2012, 5:23 PM PDT for San Diego County, California. It was in force for 45 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
- Sep 9, 2012, 5:23 PM PDT (00:23 UTC)
- Expired
- Sep 9, 2012, 6:08 PM PDT
- In force
- 45 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
County San Diego County, CA
The radar
The San Diego radar (KNKX), 38 km from the middle of the area, began a volume at 00:24 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 |
|---|---|---|---|
| Sep 9, 5:25 PM PDT | TSTM WND DMG | 5 Ese Pauma Valley, CA | NWS EMPLOYEE TOOK PHOTOS OF 3 LARGE PINE TREES DOWNED BY WIND. WEATHER SPOTTER REPORTED 40 MPH WIND AND PEA SIZE HAIL IN AREA. SDGE WEATHER STATION AT CUCA RANCH HAD 42 MPH GUSTS. THIS IS 2 MILE SOUTH OF PALOMAR MOUNTAIN AND ALONG HIGHWAY 76. |
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 00:00Z, 0.4 hours before the alert went out and 53 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
- 137 J/kg
- Mixed-layer CIN
- -379 J/kg
- Mixed-layer LCL
- 1160 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
889 WUUS56 KSGX 100023 SVRSGX CAC073-100130- /O.NEW.KSGX.SV.W.0028.120910T0023Z-120910T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SAN DIEGO CA 523 PM PDT SUN SEP 9 2012 THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 630 PM PDT * AT 515 PM PDT...A SEVERE THUNDERSTORM WAS REPORTED. THIS STORM WAS LOCATED 6 MILES SOUTHWEST OF PALOMAR MOUNTAIN...OR 15 MILES NORTHEAST OF ESCONDIDO...NEARLY STATIONARY. * THE SEVERE THUNDERSTORM WILL BE NEAR... 6 MILES NORTH OF VALLEY CENTER BY 625 PM PDT... && LAT...LON 3316 11716 3332 11720 3341 11680 3323 11678 TIME...MOT...LOC 0023Z 085DEG 4KT 3332 11694 $$ SMALL
1 follow-up statement
688 WWUS56 KSGX 100108 SVSSGX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN DIEGO CA 608 PM PDT SUN SEP 9 2012 CAC073-100116- /O.CAN.KSGX.SV.W.0028.000000T0000Z-120910T0130Z/ SAN DIEGO CA- 608 PM PDT SUN SEP 9 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SAN DIEGO COUNTY IS CANCELLED... THE STRONG THUNDERSTORM HAS WEAKENED AND MOVED SOUTHEAST...SO THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. LAT...LON 3316 11716 3332 11720 3341 11680 3323 11678 TIME...MOT...LOC 0106Z 085DEG 4KT 3332 11700 $$ SMALL
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 5:30 PM PDT | Flash Flood Warning | SGX | San Diego | 104 min |
| Sep 9, 7:01 PM PDT | Flash Flood Watch | SGX | Riverside, San Bernardino, San Diego | 23 hr |
| Sep 9, 7:26 PM PDT | Blowing Dust Advisory | SGX | Riverside, San Diego | 3 hr |
| Sep 10, 12:21 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino | 119 min |
| Sep 10, 1:17 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 49 min |
| Sep 10, 1:29 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Sep 10, 2:00 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 3 hr |
| Sep 10, 2:33 PM PDT | Severe Thunderstorm Warning | SGX | Orange, Riverside | 50 min |
| Sep 10, 2:42 PM PDT | Flash Flood Warning | SGX | San Diego | 93 min |
| Sep 10, 2:59 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Sep 10, 3:07 PM PDT | Special Weather Statement | SGX | Orange | 53 min |
| Sep 10, 4:34 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 116 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.