Alert archive / California / Flash Flood Warnings in 2001

Flash Flood Warning 13, NWS San Diego, CA

September 2, 2001San Bernardino County, California

NWS San Diego, CA issued this flash flood warning at Sep 2, 2001, 3:55 PM PDT for 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
Sep 2, 2001, 3:55 PM PDT (22:55 UTC)
Expired
Sep 2, 2001, 6:00 PM PDT
In force
2 hr
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 12:00Z, 10.9 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 12:00Z on 2001-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2001-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -129 square meters per square second.1939Sfc1 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
12 J/kg
Mixed-layer CIN
-160 J/kg
Mixed-layer LCL
2798 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-129 m²/s²
0-3 km storm-relative helicity
-59 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 022257
FFWSAN
CAC071-030100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
355 PM PDT SUN SEP 2 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MOUNTAINS OF SOUTHWESTERN SAN BERNARDINO COUNTY IN SOUTHERN
  CALIFORNIA 
  THIS INCLUDES THE LOCATIONS OF FOREST FALLS AND OAK GLEN

* UNTIL 600 PM PDT

* AT 350 PM PDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY
  HEAVY RAIN 12 MILES EAST OF YUCAIPA...OR BETWEEN FOREST FALLS
  AND OAK GLEN.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE NEAR FOREST
  FALLS AND OAK GLEN THROUGH 500 PM PDT...AND POSSIBLY BEYOND. MILL
  CREEK WILL SEE A SIGNIFICANT RISE IN THE   WATER LEVEL...AND
  FLOODING IS EXPECTED ALONG PARTS OF THIS CREEK...ESPECIALLY NEAR
  FOREST FALLS.

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 3402 11706 3404 11661 3424 11654 3420 11703

MAXWELL

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 1:28 PM PDTFlash Flood WarningSGXSan Diego92 min
Sep 2, 4:34 PM PDTFlash Flood WarningSGXRiverside86 min

Nearby

Flash Flood Warnings in California, 2001Every flash flood warning in 2001

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.