Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 76, NWS Austin/San Antonio, TX

September 5, 2001Medina County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 5, 2001, 6:03 PM CDT for Medina County, Texas. It was in force for 2 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
Sep 5, 2001, 6:03 PM CDT (23:03 UTC)
Expired
Sep 5, 2001, 8:30 PM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Medina County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.1 hours before the alert went out and 163 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 2001-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 392 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 2001-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
392 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
1047 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KEWX 052303
FFWSAT
FFWSAT
TXC325-060130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
603 PM CDT WED SEP 5 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  MEDINA

* UNTIL 830 PM CDT

* AT 603 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  4 MILES NORTHEAST OF HONDO...MOVING NORTHEAST AT 20 MPH. RADAR     
  ESTIMATES UP TO 2 INCHES OF RAIN HAS FALLEN OVER NORTHERN MEDINA   
  COUNTY DURING THE PAST TWO HOURS OVER ALREADY SATURATED GROUNDS.
  NUMEROUS THUNDERSTORMS ARE REDEVELOPING SOUTHWEST OF MEDINA COUNTY 
  AND WILL LIKELY PRODUCE AN ADDITIONAL 1 TO 2 INCHES OF RAIN.

EXCESSIVE RUNOFF FROM THESE STORMS 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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

LAT...LON 2913 9935 2913 9887 2954 9885 2958 9937

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 9:33 AM CDTFlash Flood WarningEWXLavaca4 hr
Sep 5, 12:23 PM CDTFlash Flood WarningEWXDeWitt, Gonzales3 hr
Sep 5, 12:41 PM CDTFlash Flood WarningEWXCaldwell, Comal, Guadalupe, Hays, Travis, Williamson3 hr
Sep 5, 12:59 PM CDTFlash Flood WarningEWXLavaca3 hr
Sep 5, 1:34 PM CDTFlash Flood WarningEWXKarnes3 hr
Sep 5, 1:51 PM CDTFlash Flood WarningEWXReal3 hr
Sep 5, 2:44 PM CDTFlash Flood WarningEWXBastrop, Fayette, Lee3 hr
Sep 5, 2:50 PM CDTFlash Flood WarningEWXWilson115 min
Sep 5, 3:01 PM CDTFlash Flood WarningEWXBandera, Kerr3 hr
Sep 5, 3:21 PM CDTFlash Flood WarningEWXComal, Gonzales, Guadalupe3 hr
Sep 5, 4:39 PM CDTFlash Flood WarningEWXKarnes, Wilson4 hr
Sep 5, 5:29 PM CDTFlash Flood WarningEWXBlanco, Kendall3 hr
Sep 5, 5:57 PM CDTFlash Flood WarningEWXBandera2 hr
Sep 5, 6:49 PM CDTFlash Flood WarningEWXBexar, Comal2 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.