Alert archive / California / Flash Flood Warnings in 2010
Flash Flood Warning 21, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Aug 25, 2010, 2:09 PM PDT for Los Angeles County, California. It was in force for 111 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
- Aug 25, 2010, 2:09 PM PDT (21:09 UTC)
- Expired
- Aug 25, 2010, 4:00 PM PDT
- In force
- 111 min
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Los Angeles County, CA
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.2 hours before the alert went out and 195 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
- 2462 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
800
WGUS56 KLOX 252109
FFWLOX
CAC037-252300-
/O.NEW.KLOX.FF.W.0021.100825T2109Z-100825T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OXNARD CA
209 PM PDT WED AUG 25 2010
THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL LOS ANGELES COUNTY IN SOUTHWEST CALIFORNIA...
INCLUDING THE SOUTHEAST PORTION OF THE ANTELOPE VALLEY AND SAN
GABRIEL MOUNTAINS
* UNTIL 400 PM PDT
* AT 155 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG AND NEARLY STATIONARY THUNDERSTORMS OVER THE SOUTHEAST PORTION
OF THE ANTELOPE VALLEY...AND THE ADJACENT FOOTHILLS OF THE SAN GABRIEL
MOUNTAINS. DOPPLER RADAR ESTIMATED RAINFALL RATES LOCALLY OVER 2 INCHES
PER HOUR...CAPABLE OF PRODUCING FLASH FLOODING IN THE WARNING AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BIG
PINES...PEARBLOSSOM...LITTLEROCK...AND LLANO. MAJOR ROADWAYS IMPACTED
BY THIS STORM INCLUDE HIGHWAYS 18 AND 138.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
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 3438 11796 3447 11806 3456 11800 3461 11777
3459 11766 3457 11766 3456 11765 3433 11763
3432 11764
$$
GOMBERG2 follow-up statements
250
WGUS76 KLOX 252157
FFSLOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
257 PM PDT WED AUG 25 2010
CAC037-252300-
/O.CON.KLOX.FF.W.0021.000000T0000Z-100825T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
257 PM PDT WED AUG 25 2010
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM PDT FOR EAST
CENTRAL LOS ANGELES COUNTY INCLUDING THE SOUTHEAST PORTION OF THE
ANTELOPE VALLEY AND EASTERN SAN GABRIEL MOUNTAINS...
AT 236 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE STRONG THUNDERSTORMS OVER THE SOUTHEAST PORTION OF THE ANTELOPE
VALLEY AND THE EASTERN SAN GABRIEL MOUNTAINS. BETWEEN 1 PM AND 240 PM...THE
STRONGEST STORM AFFECTED HIGHWAY 138...SOUTHEAST OF LLANO...EXTENDING
SOUTHWARD INTO THE SAN GABRIEL MOUNTAINS...INCLUDING THE CITIES OF BIG
PINES AND WRIGHTWOOD. THIS STRONG THUNDERSTORM COMPLEX WAS VERY SLOW
MOVING...WITH A WEATHER SPOTTER IN WRIGHTWOOD ESTIMATING RAINFALL OF
AROUND 2 INCHES IN 30 MINUTES. IN ADDITION...4 TO 6 INCHES OF WATER
WAS FLOWING IN THE ROADWAYS...WITH FLOODING OF YARDS AND STREETS.
ADDITIONAL STORMS ARE DEVELOPING ON THE NORTHWEST FLANK OF THIS THUNDERSTORM
COMPLEX...MOVING TOWARDS PALMDALE...INCLUDING HIGHWAYS 14 AND 138.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
OXNARD.
&&
LAT...LON 3438 11796 3447 11806 3456 11800 3461 11777
3459 11766 3457 11766 3456 11765 3433 11763
3432 11764
$$
GOMBERG/DANIELSON524
WGUS76 KLOX 252259
FFSLOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
359 PM PDT WED AUG 25 2010
CAC037-252305-
/O.EXP.KLOX.FF.W.0021.000000T0000Z-100825T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
359 PM PDT WED AUG 25 2010
...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 PM PDT FOR EAST CENTRAL
LOS ANGELES COUNTY...
THE INITIAL FLASH FLOOD WARNING FOR SOUTHEAST ANTELOPE VALLEY AND
THE ADJACENT SAN GABRIEL MOUNTAINS HAS EXPIRED. A NEWER FLASH FLOOD
WARNING REMAINS IN EFFECT FOR CENTRAL LOS ANGELES COUNTY INCLUDING
THE PALMDALE METROPOLITAN AREA...SOLEDAD CAYNON...AND CROWN FIRE
BURN AREA.
LAT...LON 3438 11796 3447 11806 3456 11800 3461 11777
3459 11766 3457 11766 3456 11765 3433 11763
3432 11764
$$
GOMBERG
HTTP://LANDSLIDES.USGS.GOV/RESEARCH/WILDFIREThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 1:46 PM PDT | Special Weather Statement | LOX | Los Angeles | 59 min |
| Aug 25, 3:17 PM PDT | Special Weather Statement | LOX | Los Angeles | 58 min |
| Aug 25, 3:24 PM PDT | Flash Flood Warning | LOX | Los Angeles | 111 min |
Nearby
Flash Flood Warnings in California, 2010Every flash flood warning in 2010
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.