Alert archive / California / Flash Flood Warnings in 2002

Flash Flood Warning 3, NWS San Diego, CA

September 9, 2002Orange County, California

NWS San Diego, CA issued this flash flood warning at Sep 9, 2002, 2:55 AM PDT for Orange County, California. It was in force for 65 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
Sep 9, 2002, 2:55 AM PDT (09:55 UTC)
Expired
Sep 9, 2002, 4:00 AM PDT
In force
65 min
Issued by
NWS San Diego, CA
Area
Whole counties

County Orange County, CA

The radar

The Santa Ana Mts radar (KSOX), 20 km from the middle of the area, began a volume at 09:56 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 00:00Z, 9.9 hours before the alert went out and 111 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 2002-09-09Temperature 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 2002-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.19395878Sfc1 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
3416 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
41 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 111222
FFWSGX
CAC059-091100-

BULLETIN - EAS ACTIVATION REQUESTED
COMBINED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
255 AM PDT MON SEP 9 2002

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

*  COMBINED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING FOR...
   WESTERN ORANGE COUNTY-
   IN SOUTHWEST CALIFORNIA

*  SEVERE THUNDERSTORM WARNING UNTIL 400 AM PDT.
   FLASH FLOOD WARNING UNTIL 400 AM PDT.

*  AT 255 AM PDT...
   NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
   A SEVERE THUNDERSTORM WITH VERY HEAVY RAIN OVER THE
   COASTAL AREAS OF WESTERN ORANGE COUNTY COASTAL AREAS...
   CENTERED NEAR EEE.

$$

MACK

Nearby

Flash Flood Warnings in California, 2002Every flash flood warning in 2002

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.