Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 268

April 4, 20046 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2004, 8:40 PM CDT for 6 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 4, 2004, 8:40 PM CDT (01:40 UTC)
Expired
Apr 4, 2004, 10:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Brooks County, TX, Jim Hogg County, TX, Kleberg County, TX, Nueces County, TX, Starr County, TX, Zapata County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 1.7 hours before the alert went out and 105 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 2004-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 903 joules per kilogram.LCLEL10008507005003002001001 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 2004-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 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
903 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
615 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.6
Supercell composite
4.1

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 4, 10:21 PM CDTMesoscale DiscussionSPCAransas, Brooks, Hidalgo, Jim Hogg, Kenedy, Kleberg and 3 more114 min
Apr 5, 1:09 PM CDTMesoscale DiscussionSPCBrewster, Culberson, Hudspeth, Jeff Davis, Pecos, Presidio and 2 more96 min
Apr 5, 2:00 PM CDTSevere Thunderstorm WatchSPCBrewster, Crane, Culberson, Hudspeth, Jeff Davis, Loving and 7 more6 hr
Apr 5, 3:51 PM CDTMesoscale DiscussionSPCBrewster, Crane, Culberson, Hudspeth, Jeff Davis, Loving and 7 more114 min
Apr 5, 6:05 PM CDTMesoscale DiscussionSPCBrewster, Crockett, Edwards, Kinney, Maverick, Real and 3 more2 hr

Nearby

Mesoscale Discussions in Texas, 2004Every mesoscale discussion 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.