Alert archive / Texas / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 166

April 11, 200040 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 11, 2000, 8:00 PM CDT for 40 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 11, 2000, 8:00 PM CDT (01:00 UTC)
Expired
Apr 12, 2000, 1:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 40 counties

Bell County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Crockett County, TX, Edwards County, TX, Ellis County, TX, Falls County, TX, Gillespie County, TX, Hamilton County, TX, Hill County, TX, Irion County, TX, Johnson County, TX, Kaufman County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Limestone County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, Real County, TX, Robertson County, TX, San Saba County, TX, Schleicher County, TX, Somervell County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Val Verde County, TX, Williamson County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 11, 8:06 PM CDTSevere Thunderstorm WarningSJTTom Green54 min
Apr 11, 8:13 PM CDTSevere Thunderstorm WarningMAFTerrell62 min
Apr 11, 8:24 PM CDTSevere Thunderstorm WarningSJTConcho, Menard66 min
Apr 11, 8:27 PM CDTSevere Thunderstorm WarningSJTColeman, McCulloch63 min
Apr 11, 8:45 PM CDTSevere Thunderstorm WarningSJTMenard, Schleicher60 min
Apr 11, 8:51 PM CDTFlash Flood WarningSJTBrown, Coleman3 hr
Apr 11, 8:59 PM CDTSevere Thunderstorm WarningFWDComanche61 min
Apr 11, 9:01 PM CDTSevere Thunderstorm WarningSJTBrown59 min
Apr 11, 9:08 PM CDTSevere Thunderstorm WarningSJTSchleicher67 min
Apr 11, 9:14 PM CDTSevere Thunderstorm WarningMAFTerrell61 min
Apr 11, 9:42 PM CDTSevere Thunderstorm WarningSJTSutton63 min
Apr 11, 9:44 PM CDTSevere Thunderstorm WarningEWXKinney, Val Verde31 min
Apr 11, 11:47 PM CDTSevere Thunderstorm WarningEWXBlanco43 min
Apr 12, 12:14 AM CDTSevere Thunderstorm WarningEWXVal Verde61 min
Apr 12, 12:19 AM CDTSevere Thunderstorm WarningEWXEdwards56 min

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 1.0 hours before the alert went out and 188 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 2000-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2596 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 2000-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
2596 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1310 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
216 m²/s²
Significant tornado parameter
0.7
Supercell composite
5.2

Open this sounding in Storm Lab

The text

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

354 
WWUS9 KMKC 120030
SEL6  
MKC WW 120030
TXZ000-120600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 166
STORM PREDICTION CENTER NORMAN OK
730 PM CDT TUE APR 11 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   CENTRAL AND SOUTHWEST TEXAS                              

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 800 PM
UNTIL 100 AM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTH OF SANDERSON TEXAS TO
60 MILES EAST NORTHEAST OF WACO TEXAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 164...TORNADO WATCH NUMBER 165. 
WATCH NUMBERS 164...165 WILL NOT BE IN EFFECT AFTER 800 PM CDT.

DISCUSSION...STRONG/SEVERE THUNDERSTORMS CONTINUE TO DEVELOP NEAR
THE COLD FRONT AND OUTFLOW BOUNDARIES THAT ARE MOVING SLOWLY
SOUTHWARD ACROSS PARTS OF TEXAS.  AIR MASS IN THE WARM SECTOR
REMAINS MOIST AND UNSTABLE WITH CAPE OF 2000-3000 J/KG.  ALTHOUGH
WINDS ALOFT ARE NOT PARTICULARLY STRONG WITH AROUND 30 KT AT 500
MB...SUBSTANTIAL DIRECTIONAL SHEAR WITH HEIGHT IN ADVANCE OF NEW
MEXICO UPPER LOW IS PROVIDING SUFFICIENT DEEP LAYER SHEAR TO
ENHANCE STORM ORGANIZATION AND INTENSITY.


AVIATION...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 25020.


...WEISS

305,1022 325,0961 310,0961 285,1022

Nearby

Severe Thunderstorm Watches in Texas, 2000Every severe thunderstorm 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.