Alert archive / California / Flash Flood Warnings in 2000

Flash Flood Warning 5, NWS San Diego, CA

February 21, 2000Riverside County, San Diego County, California

NWS San Diego, CA issued this flash flood warning at Feb 21, 2000, 3:55 PM PST for Riverside 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
Feb 21, 2000, 3:55 PM PST (23:55 UTC)
Expired
Feb 21, 2000, 6:00 PM PST
In force
2 hr
Issued by
NWS San Diego, CA
Area
Whole counties

Counties Riverside County, CA, San Diego County, CA

The radar

The San Diego radar (KNKX), 80 km from the middle of the area, began a volume at 23:56 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, 11.9 hours before the alert went out and 100 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 2000-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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, San Diego, CA at 12:00Z on 2000-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -96 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
3 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
77 kt
0-1 km storm-relative helicity
-96 m²/s²
0-3 km storm-relative helicity
34 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 212357
FFWSGX
CAC065-073-220200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
355 PM PST MON FEB 21 2000

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTHWESTERN RIVERSIDE COUNTY IN CALIFORNIA...INCLUDING
     THE SANTA ROSA PLATEAU AND TEMECULA
  EXTREME NORTHWESTERN SAN DIEGO COUNTY IN CALIFORNIA...INCLUDING
     CAMP PENDLETON

* UNTIL 600 PM PST

* AT 350 PM PST...NATIONAL WEATHER SERVICE DOPPLER RADARS INDICATED
  MODERATE TO HEAVY RAINFALL CONTINUING ACROSS NORTHWEST SAN DIEGO
  COUNTY AND ACROSS SOUTHWEST RIVERSIDE COUNTY.

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 IN
SAN DIEGO.

$$

MARTIN

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 20, 8:30 PM PSTFlash Flood WarningSGXOrange2 hr
Feb 20, 10:15 PM PSTFlash Flood WarningSGXOrange, Riverside, San Bernardino, San Diego6 hr
Feb 21, 4:00 AM PSTFlash Flood WarningSGXSan Diego2 hr
Feb 21, 1:45 PM PSTFlash Flood WarningSGXOrange, Riverside, San Diego2 hr
Feb 21, 2:05 PM PSTSevere Thunderstorm WarningSGXSan Diego55 min
Feb 21, 2:51 PM PSTSevere Thunderstorm WarningSGXSan Diego54 min

Nearby

Flash Flood Warnings in California, 2000Every flash flood warning in 2000

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.