Alert archive / Texas / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 116

April 7, 200318 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 7, 2003, 9:45 PM CDT for 18 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 7, 2003, 9:45 PM CDT (02:45 UTC)
Expired
Apr 8, 2003, 3:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Atascosa County, TX, Bee County, TX, Bexar County, TX, Comal County, TX, Dimmit County, TX, Frio County, TX, Guadalupe County, TX, Karnes County, TX, Kinney County, TX, La Salle County, TX, Live Oak County, TX, Maverick County, TX, McMullen County, TX, Medina County, TX, Uvalde County, TX, Webb County, TX, Wilson County, TX, Zavala County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 7, 11:23 PM CDTSevere Thunderstorm WarningEWXKinney52 min
Apr 7, 11:25 PM CDTSevere Thunderstorm WarningEWXUvalde50 min
Apr 8, 12:19 AM CDTSevere Thunderstorm WarningEWXMaverick56 min
Apr 8, 1:16 AM CDTSevere Thunderstorm WarningEWXMaverick, Zavala59 min
Apr 8, 1:52 AM CDTSevere Thunderstorm WarningEWXDimmit53 min
Apr 8, 2:47 AM CDTSevere Thunderstorm WarningEWXDimmit28 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 00:00Z, 2.8 hours before the alert went out and 155 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 2003-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1447 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 00:00Z on 2003-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 square meters per square second.1939587897Sfc1 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
1447 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1863 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 7, 7:29 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bee, Bexar, Blanco, Caldwell and 21 more2 hr
Apr 7, 11:36 PM CDTMesoscale DiscussionSPCAtascosa, Dimmit, Frio, Kinney, La Salle, Live Oak and 5 more114 min
Apr 8, 2:08 AM CDTMesoscale DiscussionSPCDimmit, La Salle, Webb67 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.