Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 147, NWS Austin/San Antonio, TX

October 12, 2001Bastrop County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Oct 12, 2001, 11:25 PM CDT for Bastrop County, Texas. It was in force for 65 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, 11:25 PM CDT (04:25 UTC)
Expired
Oct 13, 2001, 12:30 AM CDT
In force
65 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Bastrop County, TX

The radar

The Austin/San Antonio radar (KEWX), 34 km from the middle of the area, began a volume at 04:29 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, 4.4 hours before the alert went out and 244 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°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.

471 
WUUS54 KEWX 130427
SVRSAT
TXC021-055-187-130530-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1125 PM CDT FRI OCT 12 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  BASTROP
  CALDWELL
  GUADALUPE

* UNTIL 1230 AM CDT

* AT 1125 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM AUSTIN TO SAN MARCOS TO GARDEN
  RIDGE...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL MOVING ACROSS BASTROP...CALDWELL AND  
  GUADALUPE COUNTIES THROUGH 1230 AM WITH WINDS STRONGER THAN 
  6O MPH AND LARGE HAIL LIKELY.

THESE ARE DANGEROUS STORMS. IF YOU ARE IN THEIR PATH YOU SHOULD 
PREPARE FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND 
DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 2961 9823 2945 9804 3011 9709 3040 9734
          3015 9752 2991 9781 2968 9808

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 Oct 12, 9:04 PM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Oct 12, 9:04 PM CDT, 2 hours 21 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
904 PM CDT FRI OCT 12 2001

SEVERE STORMS ONGOING ACROSS PORTIONS OF THE EWX CWA AND MUCH MORE
EXPECTED.  SPEED MAX STILL WEST OF UPPER TROUGH OVER ALONG TEXAS/NEW
MEXICO BORDER INTO THE BIG BEND AND APPEARS WILL ROUND THE BASE
AROUND OR JUST AFTER MIDNIGHT.  GOOD SHEAR...DIFFLUENCE AND CAPES
MAINTAIN SEVERE MENTIONS OVERNIGHT.  ONLY UPDATES WILL BE MAINLY FOR
THE HIGHLIGHTS AND POSSIBLY SOME TWEAKING OF VARIABLES.
04/06/08/PM

PERVIOUS DISCUSSION...
AREA LOOKS TO BE ON TRACK FOR SEVERE WEATHER TONIGHT...MAINLY OVER
NORTHERN AND EASTERN SECTIONS. STORMS SHOULD BEGIN OUT WEST LATE
THIS AFTERNOON OR EARLY THIS EVENING AND INTENSIFY AS THEY ENCOUNTER
LOW LEVEL JET OVER HILL COUNTRY INTO SOUTH CENTRAL TEXAS.  BY LATE
EVENING...THUNDERSTORMS SHOULD ALIGN THEMSELVES IN SQUALL LINE
FASHION ALONG EASTERN (NORTH SOUTH ORIENTED) ESCARPMENT...MOVING
EAST RAPIDLY...WITH TORNADOES AND LARGE HAIL POSSIBLY ACCOMPANYING
STORMS.

INTENSITY OF LOW SHOULD ALLOW FOR GOOD WRAP AROUND CLOUDINESS
THROUGH MUCH OF THE DAY ACROSS EASTERN ZONES...WITH WESTERN ZONES
CLEARING RAPIDLY TOMMORROW MORNING.  WIDESPREAD LIGHT TO MODERATE
PRECIPITATION WITH SOME ELEVATED CONVECTION POSSIBLE AFTER FRONT
PASSES LATE TONIGHT AND THIS SHOULD CONTINUE THROUGH ABOUT LATE
MORNING.

MUCH COLDER AIRMASS WILL BUILD ACROSS AREA SATURDAY NIGHT WITH LOWS
DIPPING INTO THE UPPER 30S OVER THE NORTHERN HILLS...40S ELSEWHERE.
SUNDAY LOOKS LIKE ABUNDANT SUNSHINE WITH TEMPERATURES IN THE UPPER
70S TO NEAR 80. A BEAUTIFUL WEEK IS IN STORE NEXT WEEK WITH ANOTHER
SURGE OF COLDER AIR MOVING ACROSS TUESDAY NIGHT AND WEDNESDAY.
SKIES SHOULD REMAIN MOSTLY CLEAR THROUGHOUT MUCH OF THE EXTENDED
PERIOD WITH NORTHWEST TO WESTERLY FLOW ALOFT.  LOW TEMPERATURES WILL
BE IN THE 40S DURING THE FIRST HALF OF THE WORK WEEK...WARMING INTO
THE 50S IN THE LATTER HALF.  HIGHS GENERALLY IN THE 70S MONDAY
THROUGH WEDNESDAY...WARMING INTO THE 80S WEDNESDAY THROUGH FRIDAY.

.PRELIMINARY NUMBERS...
AUS 62/69/44/77 8700
DRT 57/75/46/80 4100
SAT 62/73/42/78 8400

.EWX...NONE.

02/18

In the hours before

Local storm report, Oct 12, 9:47 PM CDT, 1 hour 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
947 PM CDT FRI OCT 12 2001

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

0930 PM    DEL RIO                   TX   1.25 INCH HAIL
10/12/01   VAL VERDE                      REPORTED BY LAW
                                          ENFORCEMENT

0945 PM    5 N SABINAL               TX   TORNADO
10/12/01   UVALDE                         REPORTED BY CO-OP
                                          OBSERVERS
Local storm report, Oct 12, 10:03 PM CDT, 1 hour 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1003 PM CDT FRI OCT 12 2001

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

0930 PM    DEL RIO                   TX   1.25 INCH HAIL
10/12/01   VAL VERDE                      REPORTED BY LAW
                                          ENFORCEMENT

0945 PM    5 N SABINAL               TX   TORNADO
10/12/01   UVALDE                         REPORTED BY CO-OP
                                          OBSERVERS

0950 PM    STONEWALL                 TX   TORNADO
10/12/01   GILLESPIE                      SEMI-TRACTOR
                                          TRAILERS OVER TURNED                                     OVERTURNED
                                          REPORTED BY
                                          EMERGENCY MANAGERS

PM

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, 11:34 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

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.