Alert archive / Texas / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 101, NWS Austin/San Antonio, TX

September 14, 1993Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Sep 14, 1993, 2:33 AM CDT for Williamson County, Texas. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Sep 14, 1993, 2:33 AM CDT (07:33 UTC)
Expired
Sep 14, 1993, 3:15 AM CDT
In force
42 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Williamson County, TX

The nearest sounding before it

Stephenville/Cla, TX (KSEP), launched 00:00Z, 7.6 hours before the alert went out and 181 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, Stephenville/Cla, TX at 00:00Z on 1993-09-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1633 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, Stephenville/Cla, TX at 00:00Z on 1993-09-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 146 square meters per square second.19395878Sfc1 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
1633 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1032 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
146 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
1.5
Supercell composite
8.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAUS 140738
SVRAUS
TXC491-140815-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
233 AM CDT TUE SEP 14 1993
 
THE NATIONAL WEATHER SERVICE IN AUSTIN HAS ISSUED A

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.

In the hours before

Special weather statement, Sep 14, 1:55 AM CDT, 38 minutes before
TXZ030-034>037-140830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
155 AM CDT TUE SEP 14 1993

...TORNADO WATCH IN EFFECT UNTIL 3 AM FOR MILLS...SAN SABA...LAMPASAS...
LLANO...BURNET...GILLESPIE AND BLANCO COUNTIES
...TORNADO WATCH IN EFFECT UNTIL 6 AM FOR ALL COUNTIES IN CENTRAL TEXAS
ALONG AND EAST OF I-35...
...FLASH FLOOD WATCH IN EFFECT FOR ALL COUNTIES IN CENTRAL TEXAS ALONG
AND WEST OF I-35 THROUGH TUESDAY MORNING...

AT 2 AM RADAR SHOWED SHOWERS AND THUNDERSTORMS FROM SOUTHEAST OF KILLEEN
TO AUSTIN AND SOUTH TO SEGUIN.  THIS ACTIVITY WAS MOVING NORTHEAST AT
40 MPH.

THESE STORMS ARE CAPABLE OF BRIEF HEAVY HEAVY RAIN...DAMAGING WINDS AND
DANGEROUS LIGHTNING.

SEEK SHELTER IF YOU ARE IN THE IMMEDIATE PATH OF THESE STORMS.  MOTORISTS

ARE URGED TO AVOID LOW WATER CROSSINGS NEAR STORMS AND NOT TO CROSS
FLOODED ROADWAYS.

SL
Special weather statement, Sep 14, 2:06 AM CDT, 27 minutes before
TXZ030-034>037-140830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
155 AM CDT TUE SEP 14 1993

...TORNADO WATCH IN EFFECT UNTIL 3 AM FOR MILLS...SAN SABA...LAMPASAS...
LLANO...BURNET...GILLESPIE AND BLANCO COUNTIES
...TORNADO WATCH IN EFFECT UNTIL 6 AM FOR ALL COUNTIES IN CENTRAL TEXAS
ALONG AND EAST OF I-35...
...FLASH FLOOD WATCH IN EFFECT FOR ALL COUNTIES IN CENTRAL TEXAS ALONG
AND WEST OF I-35 THROUGH TUESDAY MORNING...

AT 2 AM RADAR SHOWED SHOWERS AND THUNDERSTORMS FROM SOUTHEAST OF KILLEEN
TO AUSTIN AND SOUTH TO SEGUIN.  THIS ACTIVITY WAS MOVING NORTHEAST AT
40 MPH.

THESE STORMS ARE CAPABLE OF BRIEF HEAVY HEAVY RAIN...DAMAGING WINDS AND
DANGEROUS LIGHTNING.

SEEK SHELTER IF YOU ARE IN THE IMMEDIATE PATH OF THESE STORMS.  MOTORISTS

ARE URGED TO AVOID LOW WATER CROSSINGS NEAR STORMS AND NOT TO CROSS
FLOODED ROADWAYS.

SL

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 13, 8:58 PM CDTTornado WarningEWXLlano, San Saba47 min
Sep 13, 9:54 PM CDTTornado WarningEWXSan Saba36 min
Sep 13, 10:33 PM CDTFlash Flood WarningEWXBandera, Kerr4 hr
Sep 13, 10:53 PM CDTTornado WarningEWXGillespie52 min
Sep 13, 11:00 PM CDTSevere Thunderstorm WarningEWXBandera60 min
Sep 13, 11:25 PM CDTTornado WarningEWXSan Saba50 min
Sep 13, 11:27 PM CDTSevere Thunderstorm WarningEWXLlano48 min
Sep 13, 11:42 PM CDTTornado WarningEWXBurnet63 min

Nearby

Severe Thunderstorm Warnings in Texas, 1993Every severe thunderstorm warning in 1993

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.