Alert archive / California / Flash Flood Warnings in 2015
Flash Flood Warning 21, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 26, 2015, 2:53 PM PDT for San Diego County, California. It was in force for 3 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
- Aug 26, 2015, 2:53 PM PDT (21:53 UTC)
- Expired
- Aug 26, 2015, 6:00 PM PDT
- In force
- 3 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), 74 km from the middle of the area, began a volume at 21:56 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, 9.9 hours before the alert went out and 86 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
- 1595 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- -18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
123
WGUS56 KSGX 262153
FFWSGX
CAC073-270100-
/O.NEW.KSGX.FF.W.0021.150826T2153Z-150827T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
253 PM PDT WED AUG 26 2015
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN SAN DIEGO COUNTY IN SOUTHWESTERN CALIFORNIA...
* UNTIL 600 PM PDT
* AT 252 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN ACROSS INTERSTATE 8 NEAR BOULEVARD. FLASH FLOODING WILL
LIKELY BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE...
I-8 BETWEEN BOULEVARD AND IMPERIAL COUNTY LINE...I-8 BETWEEN PINE
VALLEY AND BOULEVARD...BOULEVARD...HWY S2 BETWEEN CANEBRAKE AND
IMPERIAL COUNTY LINE...MOUNTAIN SPRING...CAMPO...JACUMBA...TIERRA
DEL SOL...LIVE OAK SPRINGS AND LA POSTA INDIAN RESERVATION.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 3282 11646 3284 11610 3274 11610 3262 11611
3259 11645
$$
HARRISON2 follow-up statements
168
WGUS76 KSGX 262250
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
350 PM PDT WED AUG 26 2015
CAC073-270100-
/O.CON.KSGX.FF.W.0021.000000T0000Z-150827T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
350 PM PDT WED AUG 26 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM PDT FOR
SOUTHEASTERN SAN DIEGO COUNTY...
AT 343 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS HAVE WEAKENED
OVER THE BOULEVARD AREA...BUT A NEW THUNDERSTORM WAS DEVELOPING NEAR
PINE VALLEY. THE EARLIER THUNDERSTORMS PRODUCED A PEAK OF AROUND 2.1
INCHES OF RADAR ESTIMATED RAINFALL IN ONE HOUR...AND MINOR FLOODING
OF MCCAIN VALLEY ROAD WAS REPORTED. FLASH FLOODING MAY STILL OCCUR
AS EARLIER RAINFALL RUN-OFF CONTINUES.
SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE...
I-8 BETWEEN BOULEVARD AND IMPERIAL COUNTY LINE...I-8 BETWEEN PINE
VALLEY AND BOULEVARD...BOULEVARD...HWY S2 BETWEEN CANEBRAKE AND
IMPERIAL COUNTY LINE...MOUNTAIN SPRING...CAMPO...JACUMBA...TIERRA DEL
SOL...LIVE OAK SPRINGS AND LA POSTA INDIAN RESERVATION.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 3282 11646 3284 11610 3274 11610 3262 11611
3259 11645
$$
HARRISON984
WGUS76 KSGX 270051
FFSSGX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
551 PM PDT WED AUG 26 2015
CAC073-270100-
/O.EXP.KSGX.FF.W.0021.000000T0000Z-150827T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
551 PM PDT WED AUG 26 2015
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SAN DIEGO COUNTY WILL
EXPIRE AT 600 PM PDT...
THUNDERSTORMS HAVE DIMINISHED OVER THE AREA...SO THE FLASH FLOOD
WARNING WILL BE ALLOWED TO EXPIRE AT 6 PM.
LAT...LON 3282 11646 3284 11610 3274 11610 3262 11611
3259 11645
$$
HARRISONThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 2:43 PM PDT | Special Weather Statement | SGX | 47 min | |
| Aug 26, 4:08 PM PDT | Special Weather Statement | SGX | San Diego | 52 min |
Nearby
Flash Flood Warnings in California, 2015Every flash flood warning in 2015
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.