Alert archive / Texas / Tornado Warnings in 2001

Tornado Warning 25, NWS Austin/San Antonio, TX

October 12, 2001Blanco County, Gillespie County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Oct 12, 2001, 9:56 PM CDT for Blanco County, Gillespie County, Texas. It was in force for 64 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, 9:56 PM CDT (02:56 UTC)
Expired
Oct 12, 2001, 11:00 PM CDT
In force
64 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Blanco County, TX, Gillespie County, TX

The radar

The Austin/San Antonio radar (KEWX), 84 km from the middle of the area, began a volume at 02:56 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, 6:30 PM CDTTornado WatchSPC6 hr
Oct 12, 6:30 PM CDTTornado WatchSPC6 hr
Oct 12, 9:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 2.9 hours before the alert went out and 249 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 00:00Z on 2001-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3303 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2001-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
3303 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1597 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
2.5
Supercell composite
22.5

Open this sounding in Storm Lab

The text

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

228 
WFUS54 KEWX 130257
TORSAT
TXC031-171-130400-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  GILLESPIE
  BLANCO

* UNTIL 1100 PM CDT

* AT 956 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH STRONG SIGNS THAT A TORNADO IS DEVELOPING 9 MILES
  WEST OF JOHNSON CITY...OR NEAR STONWALL...MOVING EAST AT 30 MPH.

* THE TORNADO PRODUCING STORM IS EXPECTED TO BE...
  OVER JOHNSON CITY AT 1005 PM

GILLESPIE COUNTY EMERGENCY MANAGEMENT REPORTED A TORNADO ON THE 
GROUND AT STONEWALL WITH A TRACTOR TRAILER OVERTURNED. 

LAT...LON 3050 9869 3017 9866 3008 9833 3044 9816

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, 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
Oct 12, 11:58 PM CDTSevere Thunderstorm WarningEWXBexar, Comal62 min

Nearby

Tornado Warnings in Texas, 2001Every tornado warning in 2001Tornadoes 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.