Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 151, NWS Austin/San Antonio, TX

October 12, 2001Bexar County, Comal County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Oct 12, 2001, 11:58 PM CDT for Bexar County, Comal County, Texas. It was in force for 62 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
Oct 12, 2001, 11:58 PM CDT (04:58 UTC)
Expired
Oct 13, 2001, 1:00 AM CDT
In force
62 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 radar

The Austin/San Antonio radar (KEWX), 46 km from the middle of the area, began a volume at 04:58 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 12, 9:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.0 hours before the alert went out and 230 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 2001-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3505 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 2001-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 square meters per square second.1939587897Sfc1 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
3505 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
755 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
2.8
Supercell composite
13.4

Open this sounding in Storm Lab

The text

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

477 
WUUS54 KEWX 130459
SVRSAT
TXC029-091-130600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1158 PM CDT FRI OCT 12 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 100 AM CDT

* AT 1158 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SHOWERS AND THUNDERSTORMS...SOME SEVERE OVER BEXAR AND COMAL       
  COUNTIES...MOVING EAST AT 20 MPH.

  DAMAGING WINDS...HAIL...FREQUENT LIGHTNING AND PERIODS OF HEAVY    
  RAIN ARE EXPECTED WITH THESE THUNDERSTORMS OVER BEXAR AND 
  COMAL COUNTIES.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS LOW WATER CROSSINGS...
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND
RIVERS MAY ALSO RISE. SEEK HIGHER GROUND IF THREATENED BY FLOOD
WATERS.


LAT...LON 2931 9876 2920 9846 2951 9825 2960 9839
          2976 9817 2999 9829 2967 9870

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 12, 7:16 PM CDTSevere Thunderstorm WarningEWXEdwards59 min
Oct 12, 7:21 PM CDTSevere Thunderstorm WarningEWXKinney64 min
Oct 12, 7:33 PM CDTTornado WarningEWXKinney57 min
Oct 12, 8:08 PM CDTSevere Thunderstorm WarningEWXEdwards, Real67 min
Oct 12, 8:20 PM CDTSevere Thunderstorm WarningEWXUvalde55 min
Oct 12, 8:37 PM CDTSevere Thunderstorm WarningEWXKerr63 min
Oct 12, 9:06 PM CDTTornado WarningEWXUvalde39 min
Oct 12, 9:27 PM CDTSevere Thunderstorm WarningEWXBlanco48 min
Oct 12, 9:28 PM CDTSevere Thunderstorm WarningEWXGillespie, Kerr62 min
Oct 12, 9:40 PM CDTSevere Thunderstorm WarningEWXKinney50 min
Oct 12, 9:45 PM CDTTornado WarningEWXMedina, Uvalde60 min
Oct 12, 9:52 PM CDTSevere Thunderstorm WarningEWXBandera, Kendall38 min
Oct 12, 9:56 PM CDTTornado WarningEWXBlanco, Gillespie64 min
Oct 12, 10:14 PM CDTSevere Thunderstorm WarningEWXBurnet46 min
Oct 12, 10:27 PM CDTSevere Thunderstorm WarningEWXHays, Travis63 min
Oct 12, 10:30 PM CDTSevere Thunderstorm WarningEWXKendall30 min
Oct 12, 10:44 PM CDTTornado WarningEWXMedina46 min
Oct 12, 10:45 PM CDTSevere Thunderstorm WarningEWXUvalde60 min
Oct 12, 10:49 PM CDTSevere Thunderstorm WarningEWXBexar71 min
Oct 12, 10:55 PM CDTSevere Thunderstorm WarningEWXBurnet, Llano65 min
Oct 12, 11:11 PM CDTSevere Thunderstorm WarningEWXComal49 min
Oct 12, 11:16 PM CDTSevere Thunderstorm WarningEWXWilliamson59 min
Oct 12, 11:25 PM CDTSevere Thunderstorm WarningEWXCaldwell, Guadalupe65 min
Oct 12, 11:25 PM CDTSevere Thunderstorm WarningEWXBastrop65 min
Oct 12, 11:34 PM CDTSevere Thunderstorm WarningEWXMedina56 min
Oct 12, 11:43 PM CDTSevere Thunderstorm WarningEWXKinney47 min
Oct 12, 11:51 PM CDTSevere Thunderstorm WarningEWXUvalde69 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; radar from the NEXRAD Level II archive.