Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 7, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Jul 30, 2012, 3:59 PM PDT for San Diego County, California. It was in force for 2 hr. 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, 2012, 3:59 PM PDT (22:59 UTC)
- Expired
- Jul 30, 2012, 6:00 PM PDT
- In force
- 2 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Flood severity
- None
County San Diego County, CA
The radar
The San Diego radar (KNKX), 71 km from the middle of the area, began a volume at 23:02 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.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 11.0 hours before the alert went out and 87 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
- 1583 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -18 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.
556
WGUS56 KSGX 302259
FFWSGX
CAC073-310100-
/O.NEW.KSGX.FF.W.0007.120730T2259Z-120731T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
359 PM PDT MON JUL 30 2012
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA...
* UNTIL 600 PM PDT
* AT 354 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A STORM OVER THE WARNED AREA. RADAR RAINFALL
ESTIMATES RANGE FROM 1.25 TO 1.75 INCHES IN THE LAST HOUR.
HOWEVER...SIMILAR STORMS NEARBY HAVE PRODUCED UP TO 2 INCHES IN
THE LAST HOUR...AND HEAVIER RAINFALL COULD BE OCCURRING.
* THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER
MAINLY RURAL AREAS OF THE INDICATED COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 3285 11637 3293 11646 3312 11639 3312 11609
3287 11610 3284 11622
$$
TAEGER/PALMER3 follow-up statements
369
WGUS76 KSGX 302333
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
433 PM PDT MON JUL 30 2012
CAC073-310100-
/O.CON.KSGX.FF.W.0007.000000T0000Z-120731T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
433 PM PDT MON JUL 30 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM PDT FOR EAST
CENTRAL SAN DIEGO COUNTY...
AT 424 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY RAIN PRODUCING FLASH FLOODING OVER THE WARNED
AREA...WITH ONE HOUR RAINFALL RATES RANGING BETWEEN 1.5 AND 3
INCHES. ALTHOUGH CHP HAS REPORTED ROADWAY FLOODING IN OCOTILLO
WELLS...FLOODING IS POSSIBLE ELSEWHERE.
THIS THUNDERSTORM WITH EXCESSIVE RAIN WILL OTHERWISE REMAIN OVER
MAINLY RURAL AREAS OF THE INDICATED COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 3285 11637 3293 11646 3312 11639 3312 11609
3287 11610 3284 11622
$$
TAEGER/PALMER891
WGUS76 KSGX 310029
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
529 PM PDT MON JUL 30 2012
CAC073-310100-
/O.CON.KSGX.FF.W.0007.000000T0000Z-120731T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
529 PM PDT MON JUL 30 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM PDT FOR EAST
CENTRAL SAN DIEGO COUNTY...
AT 518 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE LIGHT TO MODERATE RAIN...WITH LOCALLY HEAVY RAIN POSSIBLE
PRODUCING FLASH FLOODING OVER THE WARNED AREA. ONE HOUR RAINFALL
RATES CONTINUE TO INDICATE 1 TO 1.5 INCHES OF RAINFALL OVER THE FAR
EASTERN SAN DIEGO COUNTY DESERTS.
THIS THUNDERSTORM WITH EXCESSIVE RAIN WILL OTHERWISE REMAIN OVER
MAINLY RURAL AREAS OF THE INDICATED COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3285 11637 3293 11646 3312 11639 3312 11609
3287 11610 3284 11622
$$
TAEGER/PALMER133
WGUS76 KSGX 310057
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
557 PM PDT MON JUL 30 2012
CAC073-310107-
/O.EXP.KSGX.FF.W.0007.000000T0000Z-120731T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
557 PM PDT MON JUL 30 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 600 PM PDT FOR EAST CENTRAL
SAN DIEGO COUNTY...
STORMS WILL CONTINUE MOVE EAST OUT OF THE WARNED AREA...BUT LIGHT
RAIN SHOWERS WILL CONTINUE TO BE POSSIBLE. THEREFORE...THE FLASH
FLOOD WARNING WILL EXPIRE AT 600 PM PDT.
LAT...LON 3285 11637 3293 11646 3312 11639 3312 11609
3287 11610 3284 11622
$$
PALMERThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 10:55 AM PDT | Flash Flood Watch | SGX | Riverside, San Diego | 9 hr |
| Jul 30, 2:11 PM PDT | Flash Flood Warning | SGX | San Diego | 64 min |
| Jul 30, 2:54 PM PDT | Flash Flood Warning | SGX | San Diego | 111 min |
| Jul 30, 3:09 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 51 min |
Nearby
Flash Flood Warnings in California, 2012Every flash flood 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; radar from the NEXRAD Level II archive.