Alert archive / Texas / Tornado Watches in 2004

Tornado Watch 201

May 13, 200427 counties in Texas

The Storm Prediction Center issued this tornado watch at May 13, 2004, 2:30 PM CDT for 27 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 13, 2004, 2:30 PM CDT (19:30 UTC)
Expired
May 13, 2004, 8:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 27 counties

Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Edwards County, TX, Fayette County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kinney County, TX, Lavaca County, TX, Maverick County, TX, Medina County, TX, Real County, TX, Uvalde County, TX, Val Verde County, TX, Victoria County, TX, Wilson County, TX, Zavala County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 13, 2:30 PM CDTFlash Flood WarningEWXGonzales, Karnes, Wilson3 hr
May 13, 3:02 PM CDTFlash Flood WarningEWXBastrop, Caldwell, Fayette4 hr
May 13, 3:36 PM CDTTornado WarningEWXKarnes54 min
May 13, 4:34 PM CDTFlash Flood WarningEWXDeWitt, Gonzales, Karnes, Lavaca, Wilson3 hr
May 13, 4:40 PM CDTFlash Flood WarningEWXKarnes3 hr
May 13, 5:12 PM CDTTornado WarningCRPBee, Goliad48 min
May 13, 6:21 PM CDTFlash Flood WarningCRPVictoria114 min
May 13, 7:09 PM CDTSevere Thunderstorm WarningEWXZavala66 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 7.5 hours before the alert went out and 128 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 12:00Z on 2004-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3925 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2004-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
3925 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
585 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
190 m²/s²
Significant tornado parameter
1.3
Supercell composite
7.0

Open this sounding in Storm Lab

The text

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

669 
WWUS20 KWNS 131928
SEL1  
SPC WW 131930
TXZ000-140100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 201
NWS STORM PREDICTION CENTER NORMAN OK
230 PM CDT THU MAY 13 2004

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

       SOUTH TEXAS

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
800 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 25 MILES WEST NORTHWEST OF DEL RIO TEXAS TO
35 MILES NORTH OF VICTORIA 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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 197. WATCH NUMBER 197 WILL NOT BE IN EFFECT AFTER 230
PM CDT. CONTINUE...WW 198...WW 199...WW 200...

DISCUSSION...EXTREME INSTABILITY OVER S TX WITH MLCAPES IN EXCESS OF
4000 J/KG. ALTHOUGH SHEAR IS WEAK THE AMOUNT OF INSTABILITY AND
BOUNDARY INTERACTION SUPPORTS SUPERCELLS AND ISOLATED TORNADOS.  IN
ADDITION VERY LARGE HAIL AND DAMAGING DOWNBURST WINDS ARE LIKELY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600.
MEAN STORM MOTION VECTOR 24015.


...HALES

301,1011 300,0965 283,0965 284,1011

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 12, 8:04 PM CDTMesoscale DiscussionSPCArcher, Baylor, Callahan, Fisher, Foard, Hardeman and 13 more86 min
May 13, 3:52 AM CDTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bastrop, Brazos, Burleson and 27 more83 min
May 13, 8:30 AM CDTTornado WatchSPCAngelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 17 more6 hr
May 13, 9:54 AM CDTMesoscale DiscussionSPCAngelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 17 more96 min
May 13, 10:20 AM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Cottle, Dickens, Foard and 10 more115 min
May 13, 10:45 AM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Foard, Hardeman, Knox and 2 more6 hr
May 13, 12:10 PM CDTTornado WatchSPCAngelina, Austin, Brazoria, Chambers, Colorado, Fayette and 22 more6 hr
May 13, 12:26 PM CDTMesoscale DiscussionSPCBandera, Brown, Callahan, Coke, Coleman, Concho and 26 more2 hr
May 13, 12:48 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Haskell, Knox and 4 more117 min
May 13, 12:55 PM CDTTornado WatchSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more6 hr
May 13, 1:38 PM CDTMesoscale DiscussionSPCAustin, Brazoria, Chambers, Colorado, Fayette, Fort Bend and 15 more97 min
May 13, 2:48 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Haskell, Wichita87 min
May 13, 2:57 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more2 hr
May 13, 3:34 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bastrop, Bexar, Caldwell, Comal and 21 more86 min
May 13, 5:22 PM CDTMesoscale DiscussionSPCAngelina, Austin, Brazoria, Chambers, Colorado, Fort Bend and 17 more53 min
May 13, 5:54 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more96 min
May 13, 6:55 PM CDTSevere Thunderstorm WatchSPCBandera, Edwards, Gillespie, Kerr, Kimble, Mason and 6 more5 hr

Nearby

Tornado Watches in Texas, 2004Every tornado watch in 2004

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.