Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 132, NWS Austin/San Antonio, TX

July 13, 2002Williamson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 13, 2002, 6:06 PM CDT for Williamson County, Texas. It was in force for 114 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 13, 2002, 6:06 PM CDT (23:06 UTC)
Expired
Jul 13, 2002, 8:00 PM CDT
In force
114 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Williamson County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.1 hours before the alert went out and 245 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, Fort Worth, TX at 12:00Z on 2002-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 668 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, Fort Worth, TX at 12:00Z on 2002-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
668 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
1099 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
111 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 132306
FFWSAT
TXC491-140100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 PM CDT SAT JUL 13 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 800 PM CDT

* WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS
  WITH VERY HEAVY RAIN...OCCURRING OVER THE COUNTY. RAINFALL AMOUNTS 
  OF TWO TO THREE INCHES ARE POSSIBLE IN THE HEAVIER STORMS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS 
AND STREAMS...ALONG THE LOW LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.

LAT...LON 3090 9784 3065 9801 3048 9774 3051 9755
          3044 9735 3051 9721 3074 9734

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 1:32 PM CDTFlash Flood WarningEWXBandera2 hr
Jul 13, 1:42 PM CDTFlash Flood WarningEWXKendall, Kerr2 hr
Jul 13, 3:19 PM CDTFlash Flood WarningEWXGillespie3 hr
Jul 13, 3:20 PM CDTFlash Flood WarningEWXMedina, Uvalde3 hr
Jul 13, 3:59 PM CDTFlash Flood WarningEWXBurnet, Llano, Williamson2 hr
Jul 13, 4:28 PM CDTFlash Flood WarningEWXReal3 hr
Jul 13, 5:59 PM CDTFlash Flood WarningEWXBandera, Kendall, Kerr, Medina, Uvalde91 min

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.