Alert archive / California / Flash Flood Warnings in 2004

Flash Flood Warning 4, NWS San Diego, CA

February 2, 2004San Bernardino County, California

NWS San Diego, CA issued this flash flood warning at Feb 2, 2004, 11:55 PM PST for San Bernardino County, California. It was in force for 95 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
Feb 2, 2004, 11:55 PM PST (07:55 UTC)
Expired
Feb 3, 2004, 1:30 AM PST
In force
95 min
Issued by
NWS San Diego, CA
Area
Whole counties

County San Bernardino County, CA

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 00:00Z, 7.9 hours before the alert went out and 198 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, Mercury/Desert R, NV at 00:00Z on 2004-02-03Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Mercury/Desert R, NV at 00:00Z on 2004-02-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 202 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
2983 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
202 m²/s²
0-3 km storm-relative helicity
385 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 030757
FFWSGX
CAC071-030930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1155 PM PST MON FEB 2 2004

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE SOUTHWEST SLOPES OF THE MOUNTAINS BELOW 3500 FEET AND ADJACENT
  VALLEYS OF SOUTHWESTERN SAN BERNARDINO COUNTY IN SOUTHEAST
  CALIFORNIA

* UNTIL 130 AM PST

* AT 1150 PM PST...MODERATE TO LOCALLY HEAVY RAINFALL WAS OCCURRING
  OVER THE SOUTHWESTERN SLOPES OF THE SAN BERNARDINO COUNTY
  MOUNTAINS. DUE TO PREVIOUS RAINS OVER THE FIRE BURN AREAS...ANY
  RAINFALL WILL RUN OFF AND CREATE FLOODING AND MUD SLIDES.

MUD SLIDES AND ROCK SLIDES ARE EXPECTED WITH THIS STORM. MUD SLIDES
AND ROCK SLIDES CAN POTENTIALLY TRAP AND KILL PEOPLE CAUGHT IN THEIR
PATH. MUD SLIDES CAN ALSO CAUSE FLOODING WHERE RUNOFF IS RESTRICTED
OR BLOCKED.

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 3430 11762 3420 11759 3416 11719 3430 11719

MAXWELL

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 2, 8:00 PM PSTFlash Flood WarningSGXRiverside, San Bernardino219 days
Feb 2, 9:19 PM PSTFlash Flood WarningSGXOrange, Riverside, San Diego220 days
Feb 2, 10:21 PM PSTSevere Thunderstorm WarningSGXSan Diego69 min
Feb 2, 10:25 PM PSTFlash Flood WarningSGXRiverside, San Diego220 days
Feb 2, 10:25 PM PSTSpecial Marine WarningSGX65 min
Feb 2, 11:28 PM PSTSevere Thunderstorm WarningSGXSan Diego47 min
Feb 2, 11:29 PM PSTSevere Thunderstorm WarningSGXSan Diego46 min
Feb 3, 1:20 AM PSTFlash Flood WarningSGXSan Bernardino, San Diego220 days

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.