Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 5, NWS Austin/San Antonio, TX

April 23, 2001Bexar County, Comal County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 23, 2001, 7:50 AM CDT for Bexar County, Comal County, Texas. It was in force for 115 min. 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
Apr 23, 2001, 7:50 AM CDT (12:50 UTC)
Expired
Apr 23, 2001, 9:45 AM CDT
In force
115 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Bexar County, TX, Comal County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 0.8 hours before the alert went out and 226 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 2001-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2001-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -67 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2237 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-67 m²/s²
0-3 km storm-relative helicity
260 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 231255
FFWSAT
TXC029-091-231445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
750 AM CDT MON APR 23 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COMAL COUNTY
  BEXAR COUNTY

* UNTIL 945 AM CDT

* AT 750 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN 3 MILES SOUTHEAST OF BULVERDE...OR ABOUT 13 MILES NORTHWEST OF
  UNIVERSAL CITY.  THE AREA OF HEAVY RAIN WAS MOVING SLOWLY EAST.    
  HEAVIEST RAINFALL WILL BE IN COMAL AND NORTHERN BEXAR COUNTIES.

RAIN WILL CONTINUE ACROSS THE WARNED AREA FOR THE NEXT HOUR. 
RAINFALL RATES OF 2 INCHES ARE POSSIBLE WITH TOTAL AMOUNTS OF 3 
INCHES IN PLACES POSSIBLE.

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 2968 9879 2945 9879 2951 9845 2976 9808
          2999 9831

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 11:15 PM CDTSevere Thunderstorm WarningEWXVal Verde60 min
Apr 23, 12:11 AM CDTSevere Thunderstorm WarningEWXVal Verde64 min
Apr 23, 12:21 AM CDTSevere Thunderstorm WarningEWXEdwards69 min
Apr 23, 12:54 AM CDTFlash Flood WarningEWXVal Verde3 hr
Apr 23, 1:18 AM CDTSevere Thunderstorm WarningEWXVal Verde42 min
Apr 23, 2:02 AM CDTFlash Flood WarningEWXEdwards118 min
Apr 23, 3:24 AM CDTSevere Thunderstorm WarningEWXBandera, Kerr66 min
Apr 23, 9:20 AM CDTFlash Flood WarningEWXBexar, Comal3 hr
Apr 23, 9:39 AM CDTFlash Flood WarningEWXGuadalupe3 hr
Apr 23, 12:07 PM CDTFlash Flood WarningEWXBexar, Medina4 hr
Apr 23, 12:16 PM CDTSevere Thunderstorm WarningEWXBexar59 min
Apr 23, 12:49 PM CDTSevere Thunderstorm WarningEWXMedina41 min
Apr 23, 1:31 PM CDTSevere Thunderstorm WarningEWXGonzales, Guadalupe59 min
Apr 23, 2:05 PM CDTSevere Thunderstorm WarningEWXBexar55 min
Apr 23, 2:18 PM CDTSevere Thunderstorm WarningEWXWilson57 min
Apr 23, 3:10 PM CDTFlash Flood WarningEWXBexar5 hr
Apr 23, 4:10 PM CDTSevere Thunderstorm WarningEWXWilson50 min

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.