Alert archive / Texas / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 66

April 10, 20048 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 10, 2004, 8:00 PM CDT for 8 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Apr 10, 2004, 8:00 PM CDT (01:00 UTC)
Expired
Apr 10, 2004, 11:00 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center

Counties Brazoria County, TX, Chambers County, TX, Fort Bend County, TX, Galveston County, TX, Harris County, TX, Liberty County, TX, Matagorda County, TX, Wharton County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 10, 8:23 PM CDTSevere Thunderstorm WarningHGXChambers, Liberty67 min
Apr 10, 8:30 PM CDTSevere Thunderstorm WarningHGXHarris30 min
Apr 10, 9:28 PM CDTSevere Thunderstorm WarningHGXChambers32 min
Apr 10, 9:50 PM CDTSevere Thunderstorm WarningHGXMatagorda55 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

Corpus Christi, TX (KCRP), launched 00:00Z, 1.0 hours before the alert went out and 234 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, Corpus Christi, TX at 00:00Z on 2004-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2170 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, Corpus Christi, TX at 00:00Z on 2004-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.19395878Sfc1 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
2170 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
779 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
1.0
Supercell composite
4.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 10, 7:19 PM CDTMesoscale DiscussionSPCSan Augustine86 min
Apr 10, 9:20 PM CDTMesoscale DiscussionSPCBrooks, Cameron, Hidalgo, Kenedy, Starr, Willacy85 min
Apr 10, 9:35 PM CDTSevere Thunderstorm WatchSPCBrooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more5 hr
Apr 10, 10:52 PM CDTMesoscale DiscussionSPCAtascosa, Bee, Bexar, DeWitt, Dimmit, Duval and 14 more2 hr
Apr 11, 1:39 AM CDTMesoscale DiscussionSPCBrooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more66 min
Apr 11, 10:14 AM CDTMesoscale DiscussionSPCAustin, Bee, Brazoria, Calhoun, Chambers, Colorado and 23 more4 hr
Apr 11, 1:45 PM CDTMesoscale DiscussionSPCJefferson, Orange3 hr

Nearby

Severe Thunderstorm Watches in Texas, 2004Every severe thunderstorm 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.