Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 24, NWS Austin/San Antonio, TX

May 21, 2001Guadalupe County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 21, 2001, 6:39 AM CDT for Guadalupe 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
May 21, 2001, 6:39 AM CDT (11:39 UTC)
Expired
May 21, 2001, 8:45 AM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Guadalupe County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 11.7 hours before the alert went out and 221 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 2001-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1709 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, Corpus Christi, TX at 00:00Z on 2001-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.19395878Sfc1 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
1709 J/kg
Mixed-layer CIN
-209 J/kg
Mixed-layer LCL
1168 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 211142
FFWSAT
TXC187-211345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
639 AM CDT MON MAY 21 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GUADALUPE COUNTY

* UNTIL 845 AM CDT

* AT 639 AM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  OVER MARION AND MCQUEENEY...OR ABOUT 3 MILES NORTHWEST OF          
  SEGUIN...MOVING EAST AT 30 MPH.  THESE STORMS ARE TRAINING ACROSS
  THE COUNTY WITH RAINFALL RATES ESTIMATED AT 1 TO 2 INCHES AN
  HOUR.  

* THIS WARNING INCLUDES LOCATIONS IN AND AROUND...
  MCQUEENEY
  SEGUIN
  KINGSBURY
  ZORN

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 2961 9819 2950 9814 2960 9770 2982 9791

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 7:09 PM CDTSevere Thunderstorm WarningEWXLlano66 min
May 20, 7:10 PM CDTSevere Thunderstorm WarningEWXCaldwell65 min
May 20, 7:28 PM CDTSevere Thunderstorm WarningEWXKarnes, Wilson62 min
May 20, 7:51 PM CDTSevere Thunderstorm WarningEWXBurnet69 min
May 20, 8:29 PM CDTTornado WarningEWXBurnet31 min
May 20, 8:45 PM CDTTornado WarningEWXTravis, Williamson60 min
May 20, 9:47 PM CDTSevere Thunderstorm WarningEWXBastrop, Lee, Travis, Williamson43 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.