Alert archive / Texas / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 722

July 11, 200320 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2003, 2:00 PM CDT for 20 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 11, 2003, 2:00 PM CDT (19:00 UTC)
Expired
Jul 11, 2003, 7:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Bastrop County, TX, Bell County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Coryell County, TX, Falls County, TX, Grimes County, TX, Hays County, TX, Lampasas County, TX, Lee County, TX, Limestone County, TX, Madison County, TX, McLennan County, TX, Milam County, TX, Navarro County, TX, Robertson County, TX, Travis County, TX, Williamson County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 11, 2:41 PM CDTSevere Thunderstorm WarningFWDRobertson64 min
Jul 11, 3:07 PM CDTSevere Thunderstorm WarningHGXBrazos, Burleson38 min
Jul 11, 3:48 PM CDTSevere Thunderstorm WarningHGXBrazos, Burleson27 min
Jul 11, 4:18 PM CDTSevere Thunderstorm WarningEWXBurnet, Llano57 min
Jul 11, 6:08 PM CDTSevere Thunderstorm WarningEWXBurnet52 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

Fort Worth, TX (KFWD), launched 12:00Z, 7.0 hours before the alert went out and 204 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 12:00Z on 2003-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1465 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, Fort Worth, TX at 12:00Z on 2003-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.1939Sfc1 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
1465 J/kg
Mixed-layer CIN
-159 J/kg
Mixed-layer LCL
1221 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 11, 11:46 AM CDTMesoscale DiscussionSPCAngelina, Austin, Brazos, Chambers, Fort Bend, Grimes and 15 more119 min
Jul 11, 4:38 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Carson, Castro, Collingsworth and 22 more97 min
Jul 11, 5:25 PM CDTSevere Thunderstorm WatchSPCArmstrong, Bailey, Carson, Castro, Cochran, Dallam and 17 more6 hr
Jul 11, 6:15 PM CDTMesoscale DiscussionSPCBastrop, Bell, Brazos, Burleson, Burnet, Caldwell and 14 more60 min

Nearby

Severe Thunderstorm Watches in Texas, 2003Every severe thunderstorm watch in 2003

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.