Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 27, NWS Austin/San Antonio, TX

June 30, 2002Bexar County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 30, 2002, 8:46 AM CDT for Bexar County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 30, 2002, 8:46 AM CDT (13:46 UTC)
Expired
Jun 30, 2002, 12:00 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Bexar County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 1.8 hours before the alert went out and 219 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, Del Rio, TX at 12:00Z on 2002-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 792 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, Del Rio, TX at 12:00Z on 2002-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
792 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
82 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 
WGUS54 KEWX 301346
FFWSAT
TXC029-301700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
844 AM CDT SUN JUN 30 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  BEXAR

* UNTIL 1200 PM CDT

* AT 844 AM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  2 MILES NORTHWEST OF LEON VALLEY...MOVING NORTH AT 20 MPH.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.


LAT...LON 2928 9878 2916 9842 2946 9818 2970 9876

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 30, 4:08 AM CDTFlash Flood WarningEWXGuadalupe3 hr
Jun 30, 6:18 AM CDTFlash Flood WarningEWXBandera3 hr
Jun 30, 6:46 AM CDTFlash Flood WarningEWXBlanco, Comal, Hays4 hr
Jun 30, 7:02 AM CDTFlash Flood WarningEWXGuadalupe4 hr
Jun 30, 7:21 AM CDTFlash Flood WarningEWXLavaca4 hr
Jun 30, 7:46 AM CDTFlash Flood WarningEWXBastrop, Travis, Williamson4 hr
Jun 30, 8:08 AM CDTFlash Flood WarningEWXKendall4 hr
Jun 30, 9:29 AM CDTFlash Flood WarningEWXBurnet4 hr
Jun 30, 9:49 AM CDTFlash Flood WarningEWXGillespie3 hr
Jun 30, 10:24 AM CDTFlash Flood WarningEWXKerr3 hr
Jun 30, 10:43 AM CDTFlash Flood WarningEWXBlanco2 hr
Jun 30, 11:24 AM CDTFlash Flood WarningEWXKendall3 hr
Jun 30, 12:52 PM CDTFlash Flood WarningEWXBandera, Blanco, Burnet, Gillespie, Kendall, Kerr and 1 more3 hr
Jun 30, 1:43 PM CDTFlash Flood WarningEWXAtascosa, Bexar, Comal, Guadalupe, Hays, Wilson3 hr
Jun 30, 3:42 PM CDTFlash Flood WarningEWXBlanco, Burnet, Kendall2 hr
Jun 30, 4:54 PM CDTFlash Flood WarningEWXBlanco, Comal, Gillespie, Hays, Kendall, Kerr3 hr

Nearby

Flash Flood Warnings in Texas, 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.