Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 42, NWS Austin/San Antonio, TX

August 31, 20015 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 31, 2001, 4:43 AM CDT for 5 counties in 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 31, 2001, 4:43 AM CDT (09:43 UTC)
Expired
Aug 31, 2001, 7:45 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Bexar County, TX, Caldwell County, TX, Comal County, TX, Guadalupe County, TX, Hays County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 9.7 hours before the alert went out and 233 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, Corpus Christi, TX at 00:00Z on 2001-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3264 joules per kilogram.LCLEL10008507005003002001001 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, Corpus Christi, TX at 00:00Z on 2001-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
3264 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
80 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 310944
FFWSAT
TXC029-055-091-187-209-311245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
443 AM CDT FRI AUG 31 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COMAL
  BEXAR
  HAYS
  GUADALUPE
  CALDWELL

* UNTIL 745 AM CDT

* AT 443 AM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN   
DEVELOPING AND SPREADING NORTHEAST FROM SAN ANTONIO TO WIMBERLY AND 
LOCKHART.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.


LAT...LON 2951 9863 2939 9847 2979 9746 3015 9809

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 1:55 AM CDTFlash Flood WarningEWXDeWitt, Lavaca2 hr
Aug 31, 3:33 AM CDTFlash Flood WarningEWXGonzales3 hr
Aug 31, 4:00 AM CDTFlash Flood WarningEWXDeWitt, Lavaca4 hr
Aug 31, 6:28 AM CDTFlash Flood WarningEWXGonzales3 hr
Aug 31, 7:37 AM CDTFlash Flood WarningEWXKarnes113 min
Aug 31, 7:41 AM CDTFlash Flood WarningEWXBexar, Comal, Hays, Travis2 hr
Aug 31, 8:20 AM CDTFlash Flood WarningEWXDeWitt, Lavaca3 hr
Aug 31, 8:32 AM CDTFlash Flood WarningEWXFayette2 hr
Aug 31, 9:25 AM CDTFlash Flood WarningEWXGonzales, Karnes3 hr
Aug 31, 10:55 AM CDTFlash Flood WarningEWXDeWitt, Karnes, Lavaca2 hr
Aug 31, 12:50 PM CDTFlash Flood WarningEWXDeWitt, Karnes, Lavaca2 hr

Nearby

Flash Flood Warnings in Texas, 2001Every flash flood warning in 2001

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.