Alert archive / Texas / Tornado Watches in 2000

Tornado Watch 165

April 11, 200035 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 11, 2000, 3:00 PM CDT for 35 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Apr 11, 2000, 3:00 PM CDT (20:00 UTC)
Expired: Apr 11, 2000, 8:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 35 counties

Borden County, TX, Brewster County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crane County, TX, Crockett County, TX, Dawson County, TX, Edwards County, TX, Fisher County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kimble County, TX, Martin County, TX, Menard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 111 km from the middle of the area, began a volume at 20:01 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.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Apr 11, 4:22 PM CDT	Severe Thunderstorm Warning	MAF	Upton	38 min
Apr 11, 4:57 PM CDT	Severe Thunderstorm Warning	MAF	Reagan, Upton	63 min
Apr 11, 5:58 PM CDT	Severe Thunderstorm Warning	MAF	Reagan	47 min
Apr 11, 6:09 PM CDT	Severe Thunderstorm Warning	SJT	Irion	66 min
Apr 11, 6:24 PM CDT	Severe Thunderstorm Warning	SJT	Runnels	66 min
Apr 11, 6:32 PM CDT	Tornado Warning	SJT	Irion	58 min
Apr 11, 6:34 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	56 min
Apr 11, 6:50 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher	55 min
Apr 11, 7:09 PM CDT	Tornado Warning	SJT	Concho, Runnels	36 min
Apr 11, 7:15 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	60 min
Apr 11, 7:25 PM CDT	Severe Thunderstorm Warning	SJT	Irion	50 min
Apr 11, 7:29 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, McCulloch	61 min
Apr 11, 7:40 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher	65 min
Apr 11, 7:57 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	63 min

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 8.0 hours before the alert went out and 132 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 610 J/kg
Mixed-layer CIN: -344 J/kg
Mixed-layer LCL: 1460 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

219 
WWUS9 KMKC 111941
SEL5  
MKC WW 111941
TXZ000-120100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 165
STORM PREDICTION CENTER NORMAN OK
241 PM CDT TUE APR 11 2000

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

   WESTERN AND SOUTHWEST TEXAS                              

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 800
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 100 STATUTE MILES EAST AND WEST
OF A LINE FROM 50 MILES SOUTHEAST OF SANDERSON TEXAS TO 50 MILES
NORTHWEST OF ABILENE 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.

OTHER WATCH INFORMATION...  CONTINUE...WW 164...

DISCUSSION...DIURNAL HEATING HAS BOOSTED SURFACE-BASED CAPE TO
ABOVE 2500 J/KG ALONG AND S OF SHALLOW...SLOW-MOVING FRONT ATTM
EXTENDING FROM E OF ABI WSW TO WEAK LOW S OF MAF.  PARTIAL CLEARING
HAS ALSO OCCURRED N OF THIS BOUNDARY TO VICINITY OF DEEPER FRONT
NOW LOCATED FROM S OF SPS TO S OF LBB.  COMBINATION OF STEEP MID
LEVEL LAPSE RATES AND CONTINUED HEATING/MOISTURE INFLUX SUGGESTS
LIKELIHOOD OF INCREASED STORM DEVELOPMENT ACROSS MUCH OF SW TX NEXT
SEVERAL HOURS.  MID LEVEL WSW FLOW OF 30-35 KTS WILL REMAIN
FAVORABLE FOR SOME STORM ROTATION...ENHANCING THREAT FOR LARGE HAIL
AND ISOLATED TORNADOES INVOF BOUNDARIES.      

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 50 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 27020.

...CORFIDI

325,0983 293,1000 293,1032 325,1020

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 11, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	Bell, Bosque, Brown, Collin, Comanche, Cooke and 25 more	6 hr

Nearby

Tornado Watches in Texas, 2000 Every 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; radar from the NEXRAD Level II archive.