Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 49, NWS Austin/San Antonio, TX

April 23, 2001Bexar County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 23, 2001, 2:05 PM CDT for Bexar County, Texas. It was in force for 55 min. 1 report came from 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, with what was reported inside it.

The facts

Issued
Apr 23, 2001, 2:05 PM CDT (19:05 UTC)
Expired
Apr 23, 2001, 3:00 PM CDT
In force
55 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Bexar County, TX

What was reported inside it

TimeReportWhereRemark
Apr 23, 2:45 PM CDTHail 0.75St Hedwig, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 7.1 hours before the alert went out and 212 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.

000 
WUUS54 KEWX 231905
SVRSAT
TXC029-232000-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 300 PM CDT

* AT 205 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF CHINA GROVE...OR ABOUT 9
  MILES SOUTHEAST OF SAN ANTONIO...MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  7 MILES NORTH OF ELMENDORF AT 210 PM CDT
  OVER CHINA GROVE AT 215 PM CDT
  OVER ST. HEDWIG AT 230 PM CDT

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.


LAT...LON 2936 9863 2924 9849 2916 9840 2944 9818
          2965 9836

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, 1:31 PM CDTSevere Thunderstorm WarningEWXGonzales, Guadalupe59 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.