Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 90, NWS Austin/San Antonio, TX

July 3, 2002Comal County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 3, 2002, 9:25 PM CDT for Comal County, Texas. It was in force for 110 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 3, 2002, 9:25 PM CDT (02:25 UTC)
Expired
Jul 3, 2002, 11:15 PM CDT
In force
110 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Comal County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 2.4 hours before the alert went out and 241 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 00:00Z on 2002-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 53 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 00:00Z on 2002-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.193958Sfc1 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
53 J/kg
Mixed-layer CIN
-220 J/kg
Mixed-layer LCL
877 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-20 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 
WGUS54 KEWX 040225
FFWSAT
TXC091-040415-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
921 PM CDT WED JUL 3 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 1115 PM CDT

* AT 920 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  OVER WESTERN COMAL COUNTY MOVING NORTH AT NEAR 20 MPH.

TRAINING THUNDERSTORMS WITH HEAVY RAIN OVER WESTERN COMAL COUNTY 
FROM BULVERDE TO NEAR SPRING BRANCH WILL RESULT IN RAPID RISES OF 
LOW WATER CROSSING...CREEKS...AND STREAMS FOR THE NEXT FEW HOURS.
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN A SHORT 
PERIOD OF TIME.  

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 2979 9857 2976 9839 2994 9823 3001 9831

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 7:06 PM CDTFlash Flood WarningEWXBexar3 hr
Jul 3, 7:32 PM CDTFlash Flood WarningEWXAtascosa118 min
Jul 3, 8:11 PM CDTFlash Flood WarningEWXKendall3 hr
Jul 3, 9:03 PM CDTFlash Flood WarningEWXFrio3 hr
Jul 3, 9:59 PM CDTFlash Flood WarningEWXAtascosa2 hr
Jul 3, 10:17 PM CDTFlash Flood WarningEWXBexar3 hr
Jul 3, 11:06 PM CDTFlash Flood WarningEWXBlanco, Gillespie, Kendall3 hr
Jul 3, 11:42 PM CDTFlash Flood WarningEWXAtascosa, Frio, Medina, Uvalde3 hr
Jul 4, 12:28 AM CDTFlash Flood WarningEWXBexar, Comal, Gillespie, Kendall4 hr
Jul 4, 2:11 AM CDTFlash Flood WarningEWXBlanco4 hr
Jul 4, 2:40 AM CDTFlash Flood WarningEWXMedina, Uvalde2 hr
Jul 4, 2:50 AM CDTFlash Flood WarningEWXReal2 hr
Jul 4, 2:51 AM CDTFlash Flood WarningEWXLlano2 hr
Jul 4, 3:04 AM CDTFlash Flood WarningEWXBurnet116 min
Jul 4, 4:50 AM CDTFlash Flood WarningEWXBandera, Gillespie, Kendall, Kerr, Llano, Medina and 2 more7 hr
Jul 4, 6:51 AM CDTFlash Flood WarningEWXBlanco5 hr
Jul 4, 7:32 AM CDTFlash Flood WarningEWXBurnet4 hr
Jul 4, 7:52 AM CDTFlash Flood WarningEWXBexar4 hr
Jul 4, 9:29 AM CDTFlash Flood WarningEWXVal Verde3 hr
Jul 4, 11:40 AM CDTFlash Flood WarningEWXBandera, Bexar, Blanco, Burnet, Comal, Gillespie and 4 more4 hr
Jul 4, 2:18 PM CDTFlash Flood WarningEWXAtascosa, Frio102 min
Jul 4, 3:53 PM CDTFlash Flood WarningEWXAtascosa, Bandera, Bexar, Blanco, Burnet, Comal and 8 more4 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.