Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 29, NWS Austin/San Antonio, TX

March 12, 2001Travis County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 12, 2001, 1:16 AM CST for Travis County, Texas. It was in force for 59 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
Mar 12, 2001, 1:16 AM CST (07:16 UTC)
Expired
Mar 12, 2001, 2:15 AM CST
In force
59 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Travis County, TX

What was reported inside it

TimeReportWhereRemark
Mar 12, 1:30 AM CSTThunderstorm WindAustin, TXSevere thunderstorm winds destroyed the roofs of two large apartment complexes in Austin. The damage left 63 residents homeless for several days.

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 watch it was issued in

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

IssuedProductOfficeLasted
Mar 11, 11:00 PM CSTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 7.3 hours before the alert went out and 285 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, Fort Worth, TX at 00:00Z on 2001-03-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1045 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, Fort Worth, TX at 00:00Z on 2001-03-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 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
1045 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
503 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

087 
WUUS54 KEWX 120719
SVRSAT
TXC453-120815-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
116 AM CST MON MAR 12 2001

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A

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

  TRAVIS COUNTY...INCLUDING THE AUSTIN METROPOLITAN AREA

* UNTIL 215 AM CST

* AT 116 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM IN THE LAKEWAY-BEE CAVE AREA.  MOVEMENT WAS  
  TOWARD THE EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  IN THE AUSTIN METROPOLITAN AREA AROUND 130 AM   
  IN THE DEL VALLE-MANOR-PFLUGERVILLE AREA BY 2 AM CST

LAT...LON 3031 9800 3017 9785 3027 9754 3046 9755

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 Mar 11, 9:45 PM CST, 3 hours 31 minutes earlier.

Area forecast discussion, Mar 11, 9:45 PM CST, 3 hours 31 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
945 PM CST SUN MAR 11 2001

UPDATED ZONE FORECASTS TO INCLUDE THUNDER IN THE EDWARDS PLATEAU AND
HILL COUNTRY FOR THE REST OF TONIGHT.  SPC SUGGESTS A WATCH MAY BE
IN ORDER SHORTLY IF CONVECTION CONTINUES TO DEVELOP AND SLIP
SOUTHEASTWARD INTO NORTHWEST COUNTIES.  ALSO MENTIONED SHOWERS OR
THUNDERSTORMS FOR THE AUSTIN AND SAN ANTONIO AREAS AS WELL.

.EWX...NONE.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 11, 10:21 PM CSTSevere Thunderstorm WarningEWXVal Verde54 min
Mar 11, 10:29 PM CSTSevere Thunderstorm WarningEWXReal61 min
Mar 11, 11:14 PM CSTSevere Thunderstorm WarningEWXBandera, Real, Uvalde61 min
Mar 11, 11:42 PM CSTTornado WarningEWXVal Verde33 min
Mar 12, 12:11 AM CSTSevere Thunderstorm WarningEWXBandera, Medina64 min
Mar 12, 12:18 AM CSTSevere Thunderstorm WarningEWXKinney57 min
Mar 12, 12:55 AM CSTSevere Thunderstorm WarningEWXBexar, Kendall65 min
Mar 12, 1:09 AM CSTSevere Thunderstorm WarningEWXBandera, Real, Uvalde66 min
Mar 12, 1:44 AM CSTSevere Thunderstorm WarningEWXComal61 min
Mar 12, 1:58 AM CSTSevere Thunderstorm WarningEWXBastrop, Lee, Williamson62 min
Mar 12, 2:04 AM CSTSevere Thunderstorm WarningEWXBandera, Medina56 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.