Alert archive / California / Flash Flood Warnings in 2004

Flash Flood Warning 21, NWS Los Angeles, CA

December 29, 2004Los Angeles County, California

NWS Los Angeles, CA issued this flash flood warning at Dec 29, 2004, 4:37 AM PST for Los Angeles 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: Dec 29, 2004, 4:37 AM PST (12:37 UTC)
Expired: Dec 29, 2004, 7:30 AM PST
In force: 3 hr
Issued by: NWS Los Angeles, CA
Area: Counties, with a storm outline in the text

County Los Angeles County, CA

The radar

The Santa Ana Mts radar (KSOX), 79 km from the middle of the area, began a volume at 12:38 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 text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS56 KLOX 291250
FFWLOX
CAC037-291530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OXNARD CA
437 AM PST WED DEC 29 2004

THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE MOUNTAINS...THE SANTA CLARITA VALLEY...
  NORTHERN SAN FERNANDO AND SAN GABRIEL VALLEYS...
  INCLUDING THE FOOTHILL...CROWN AND PADUA BURN AREAS

* UNTIL 730 AM PST

* AT 430 AM PST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THAT MODERATE TO HEAVY SHOWERS CONTINUED TO DEVELOP ACROSS THE
  MOUNTAINS AND VALLEYS OF LOS ANGELES COUNTY. THE HEAVIEST RAIN
  EXTENDED FROM THE SANTA CLARITA VALLEY EAST SOUTHEAST TO THE 
  NORTHERN SAN GABRIEL VALLEY AND THE ADJACENT FOOTHILLS AND
  MOUNTAINS. RAINFALL RATES OF UP TO THREE QUARTERS OF AN INCH PER
  HOUR HAVE BEEN OBSERVED WITH SOME OF THESE SHOWERS. THE
  CONTINUED DEVELOPMENT OF HEAVY SHOWERS ACROSS THE AREA WILL
  LIKELY CAUSE FLASH FLOODING IN AND BELOW THE MOUNTAINS AND
  FOOTHILLS OVER THE NEXT THREE HOURS...INCLUDING THE FOOTHILL...
  CROWN AND PADUA BURN AREAS. THERE WILL ALSO BE MUD AND DEBRIS
  FLOWS IN AND BENEATH THE BURN AREAS. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE
  FOOTHILL...CROWN AND PADUA BURN AREAS.

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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
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 3429 11862 3408 11771 3429 11765 3441 11767
      3443 11799 3457 11827 3466 11879

$$

BRUNO/RAT/ASR

The office that day

Everything else NWS Los Angeles, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 28, 4:48 PM PST	Special Marine Warning	LOX		57 min
Dec 28, 5:29 PM PST	Special Marine Warning	LOX		61 min
Dec 28, 5:40 PM PST	Special Marine Warning	LOX		65 min
Dec 28, 8:20 PM PST	Special Marine Warning	LOX		3 hr
Dec 28, 10:10 PM PST	Tornado Warning	LOX	Los Angeles	50 min
Dec 28, 10:12 PM PST	Tornado Warning	LOX	Los Angeles	48 min
Dec 28, 10:43 PM PST	Tornado Warning	LOX	Los Angeles	47 min
Dec 28, 11:30 PM PST	Special Marine Warning	LOX		3 hr
Dec 29, 1:50 AM PST	Flash Flood Warning	LOX	Los Angeles	3 hr
Dec 29, 7:30 AM PST	Flash Flood Warning	LOX	Los Angeles	2 hr

Nearby

Flash Flood Warnings in California, 2004 Every flash flood warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.