Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 48, NWS Austin/San Antonio, TX

April 23, 2001Gonzales County, Guadalupe County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 23, 2001, 1:31 PM CDT for Gonzales County, Guadalupe County, Texas. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 23, 2001, 1:31 PM CDT (18:31 UTC)
Expired
Apr 23, 2001, 2:30 PM CDT
In force
59 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Gonzales County, TX, Guadalupe County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 6.5 hours before the alert went out and 202 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 12:00Z on 2001-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1138 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 12:00Z on 2001-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
1138 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

757 
WUUS54 KEWX 231832
SVRSAT
TXC177-187-231930-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
131 PM CDT MON APR 23 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  GONZALES COUNTY
  GUADALUPE COUNTY

* UNTIL 230 PM CDT

* AT 131 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 37 MILES WEST OF GONZALES...OR ABOUT 11 MILES
  SOUTHWEST OF SEGUIN...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  5 MILES SOUTH OF GONZALES AT 230 PM CDT

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 11:02 AM CDT, 2 hours 29 minutes earlier.

Area forecast discussion, Apr 23, 11:02 AM CDT, 2 hours 29 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1102 AM CDT MON APR 23 2001

SMALL CLUSTER OF VERY HEAVY RAINFALL CONTINUES IN THE SAN ANTONIO
AREA WITH A FEW REPORTS OF 3 TO 3.5 INCHES OF RAIN.  CLUSTER HAS
SHOWN SIGNS OF WEAKENING IN INTENSITY AS REDEVELOPMENT TAKES PLACE
JUST WEST.  THESE THE RESULT OF SHORT-WAVE AHEAD OF COLD FRONT.
MODELS INDICATE SHORT-WAVE WILL MOVE EAST BY EVENING.  SO...WILL
MAINTAIN HIGH POPS AND SEVERE/HEAVY RAINFALL MENTIONS...ESPECIALLY
SOUTH AND EAST FOR THIS AFTERNOON.  HOWEVER...FLASH FLOOD WATCH
CONTINUES TO BE NOT NEEDED AS WIDESPREAD FLOODING NOT EXPECTED.  WILL
MAKE SOME ADJUSTMENTS TO WINDS AND TEMPERATURES BASED ON ONGOING
TRENDS.  ANY CHANGES TO REMAINING PERIODS WILL WAIT UNTIL AFTERNOON
PACKAGE.  04/06.

.EWX...NONE.

In the hours before

Local storm report, Apr 23, 10:03 AM CDT, 3 hours 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1003 AM CDT MON APR 23 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATIONR....

0400 AM    13 N VANDERPOOL           TX   TORNADO
04/23/01   BANDERA                        TORNADO REPORTED BY CO-OP
                                          OBSERVERS
Local storm report, Apr 23, 1:20 PM CDT, 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
120 PM CDT MON APR 23 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1212 PM    SAN ANTONIO               TX   1.25 INCH HAIL
04/23/01   BEXAR                          LOOP 410/RIGSBY

JPB

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, 7:50 AM CDTFlash Flood WarningEWXBexar, Comal115 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, 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

Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm 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.