Alert archive / California / Flash Flood Warnings in 2003

Flash Flood Warning 32, NWS San Diego, CA

November 12, 2003San Bernardino County, San Diego County, California

NWS San Diego, CA issued this flash flood warning at Nov 12, 2003, 9:35 AM PST for San Bernardino County, San Diego 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
Nov 12, 2003, 9:35 AM PST (17:35 UTC)
Expired
Nov 12, 2003, 12:00 PM PST
In force
2 hr
Issued by
NWS San Diego, CA
Area
Whole counties

Counties San Bernardino County, CA, San Diego County, CA

The radar

The Santa Ana Mts radar (KSOX), 108 km from the middle of the area, began a volume at 17:36 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, 5.6 hours before the alert went out and 143 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 12:00Z on 2003-11-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 148 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2003-11-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.1939587897117136Sfc1 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
148 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
533 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
152 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 121740
FFWSGX
CAC071-073-122000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
935 AM PST WED NOV 12 2003

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA 
     THIS INCLUDES THE CITIES OF...YUCAIPA... AND SAN BERNARDINO.
  CENTRAL SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA
     THIS INCLUDES THE CITIES OF...JULIAN AND CUYAMACA.

* UNTIL 1200 PM PST

* AT 930 AM PST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY 
  RAIN OVER THE MOUNTAINS OF SAN SAN BERNARDINO...RIVERSIDE...AND 
  SAN DIEGO COUNTIES. THE SHOWERS WERE MOVING NORTHWEST AT ABOUT 
  15 MPH.
 
THE LIKELIHOOD OF MUD AND DEBRIS SLIDES WILL BE ESPECIALLY HIGH IN 
RECENTLY BURNED AREAS AND ON SOUTHWEST FACING SLOPES.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS 
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY 
AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK 
HIGHER GROUND.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

$$

LAT...LON 3434 11762 3259 11667 3260 11620 3370 11669
          3473 11760

Nearby

Flash Flood Warnings in California, 2003Every flash flood warning in 2003

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.