Alert archive / Texas / Tornado Watches in 2000

Tornado Watch 804

November 23, 200041 counties in Texas

The Storm Prediction Center issued this tornado watch at Nov 23, 2000, 7:30 PM CST for 41 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Nov 23, 2000, 7:30 PM CST (01:30 UTC)
Expired
Nov 24, 2000, 1:00 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 41 counties

Anderson County, TX, Austin County, TX, Bastrop County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Bosque County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, Comanche County, TX, Coryell County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Gillespie County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hamilton County, TX, Hays County, TX, Kendall County, TX, Lampasas County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, McLennan County, TX, Medina County, TX, Milam County, TX, Mills County, TX, Robertson County, TX, San Saba County, TX, Travis County, TX, Washington County, TX, Williamson County, TX

Warnings issued inside it

6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Nov 23, 7:48 PM CSTSevere Thunderstorm WarningEWXGillespie57 min
Nov 23, 8:31 PM CSTFlash Flood WarningEWXBexar, Medina3 hr
Nov 23, 8:35 PM CSTFlash Flood WarningEWXComal, Hays3 hr
Nov 23, 9:25 PM CSTFlash Flood WarningEWXBastrop, Caldwell, Guadalupe, Travis, Williamson3 hr
Nov 23, 10:00 PM CSTFlash Flood WarningEWXAtascosa, Gonzales, Wilson3 hr
Nov 23, 10:31 PM CSTFlash Flood WarningEWXDeWitt, Fayette, Karnes, Lavaca, Lee3 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.5 hours before the alert went out and 279 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 2000-11-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 2000-11-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
472 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

060 
WWUS9 KMKC 240112
SEL4  

SEL4  
MKC WW 240105
TXZ000-240700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 804
STORM PREDICTION CENTER NORMAN OK
705 PM CST THU NOV 23 2000

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

CENTRAL AND SOUTHEAST TEXAS                              

EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 730 PM UNTIL
100 AM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 90 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES EAST SOUTHEAST OF SAN ANTONIO TEXAS TO 25
MILES NORTH NORTHEAST OF WACO TEXAS.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

DISCUSSION...MID LEVEL TROUGH CONTINUES TO MOVE E/ESEWD TOWARD
CENTRAL TX.  THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSITY THE NEXT FEW HOURS AS LARGE SCALE ASCENT REACHES THE LOW-
LEVEL MOISTURE/INSTABILITY AXIS ACROSS CENTRAL/SE TX.  THE INITIAL
SEVERE THREATS SHOULD BE ISOLATED DAMAGING GUSTS AND LARGE HAIL...
WITH AN INCREASING THREAT OF SUPERCELLS/ISOLATED TORNADOES LATER
TONIGHT ACROSS ERN PARTS OF WATCH AREA.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. 
MEAN STORM MOTION VECTOR 26040.

...THOMPSON/CORFIDI

291,0992 315,0983 315,0953 291,0962

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 23, 10:00 PM CSTTornado WatchSPCAransas, Atascosa, Austin, Bastrop, Bee, Burleson and 24 more6 hr

Nearby

Tornado Watches in Texas, 2000Every tornado watch in 2000

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.