Alert archive / California / Flash Flood Warnings in 2004

Flash Flood Warning 65, NWS San Diego, CA

October 17, 2004Orange County, San Bernardino County, California

NWS San Diego, CA issued this flash flood warning at Oct 17, 2004, 2:55 AM PDT for Orange County, San Bernardino 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 counties it named.

The facts

Issued
Oct 17, 2004, 2:55 AM PDT (09:55 UTC)
Expired
Oct 17, 2004, 5:00 AM PDT
In force
2 hr
Issued by
NWS San Diego, CA
Area
Whole counties

Counties Orange County, CA, San Bernardino County, CA

The radar

The Santa Ana Mts radar (KSOX), 78 km from the middle of the area, began a volume at 09:58 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 00:00Z, 9.9 hours before the alert went out and 164 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.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 00:00Z on 2004-10-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 00:00Z on 2004-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1054 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS56 KSGX 171039 CCA
FFWSGX
CAC059-071-171200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
255 AM PDT SUN OCT 17 2004

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE ORANGE COUNTY COASTAL AREAS
  SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE
  THIS INCLUDES THE CITIES OF YORBA LINDA AND GARDEN GROVE

* UNTIL 500 AM PDT

* AT 245 AM PDT...HEAVY RAINFALL RATES AND URBAN FLOODING WERE      
  REPORTED FROM A THUNDERSTORM MOVING NORTHEAST ACROSS NORTHERN      
  ORANGE COUNTY. THIS STORM IS EXPECTED TO MOVE INTO THE INLAND      
  EMPIRE WITHIN THE HOUR.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  ANAHEIM.

LAT...LON 3377 11804 3373 11825 3401 11723 3428 11761

$$

PG/MARTIN

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 17, 7:47 AM PDTFlash Flood WarningSGXSan Diego118 min
Oct 17, 9:38 AM PDTFlash Flood WarningSGXSan Diego2 hr

Nearby

Flash Flood Warnings in California, 2004Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.