Alert archive / California / Flash Flood Warnings in 1998

Flash Flood Warning 34, NWS Los Angeles, CA

May 5, 1998Los Angeles County, California

NWS Los Angeles, CA issued this flash flood warning at May 5, 1998, 8:30 PM PDT for Los Angeles County, California. It was in force for 90 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 5, 1998, 8:30 PM PDT (03:30 UTC)
Expired
May 5, 1998, 10:00 PM PDT
In force
90 min
Issued by
NWS Los Angeles, CA
Area
Whole counties

County Los Angeles County, CA

The radar

The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 03:31 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 
TTAA00 KLAX 060429 COR
FFWLAX
CAC037-060500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTION
NATIONAL WEATHER SERVICE OXNARD CA
830 PM PDT TUE MAY 5 1998

...CORRECTION FOR COUNTY CODE HEADER...

THE NATIONAL WEATHER SERVICE IN OXNARD HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  EASTERN LOS ANGELES COUNTY MOUNTAINS AND ADJACENT FOOTHILLS

* UNTIL 1000 PM PDT

* AT 825 PM...DOPPLER RADARS INDICATED A STRONG LINE OF
  SHOWERS ACROSS THE EASTERN SAN GABRIEL MOUNTAINS AND
  ADJACENT FOOTHILL COMMUNITIES. THE LINE OF STORMS WAS MOVING
  SLOWLY EASTWARD TOWARDS THE LOS ANGELES/SAN BERNARDINO COUNTY
  LINE. ANOTHER BAND OF SHOWERS IS MOVING INTO THE LOS ANGELES
  BASIN...AND IS EXPECTED TO INTENSIFY OVER THE FOOTHILL AND
  MOUNTAIN AREAS AFTER 9 PM. AS A RESULT...THE FLASH FLOOD
  WARNING HAS BEEN EXTENDED FOR THE ABOVE AREAS UNTIL 10 PM.

* BETWEEN 830 PM AND 10 PM...MOUNTAIN AND ADJACENT FOOTHILL
  AREAS FROM HIGHWAY 39 AND EASTWARD WILL LIKELY EXPERIENCE FLASH
  FLOODING.  AFFECTED COMMUNITIES WILL INCLUDE AZUSA...GLENDORA...
  AND SAN DIMAS...AS WELL AS THE MORRIS RESERVOIR AREA.
  EVENING COMMUTES ALONG FOOTHILL BOULEVARD...INTERSTATE 210...AND
  HIGHWAY 39 WILL LIKELY HAVvE FLOODED ROAD CONDITIONS.

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS OCCURRING OR
IS IMMINENT. MOVE TO HIGHER GROUND IMMEDIATELY IF FLOODING IS
ENCOUNTERED. 

GOMBERG

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 5:30 PM PDTFlash Flood WarningLOXSan Luis Obispo, Santa Barbara90 min
May 5, 7:00 PM PDTFlash Flood WarningLOXSan Luis Obispo, Santa Barbara60 min
May 5, 7:20 PM PDTFlash Flood WarningLOXLos Angeles70 min
May 5, 7:55 PM PDTFlash Flood WarningLOXSan Luis Obispo, Santa Barbara2 hr
May 5, 9:50 PM PDTFlash Flood WarningLOXSan Luis Obispo, Santa Barbara2 hr
May 5, 9:55 PM PDTFlash Flood WarningLOXLos Angeles2 hr
May 5, 11:55 PM PDTFlash Flood WarningLOXLos Angeles2 hr
May 6, 1:55 AM PDTFlash Flood WarningLOXLos Angeles2 hr

Nearby

Flash Flood Warnings in California, 1998Every flash flood warning in 1998

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.