Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 61

February 1, 200419 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 1, 2004, 6:59 PM CST for 19 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Feb 1, 2004, 6:59 PM CST (00:59 UTC)
Expired
Feb 1, 2004, 9:00 PM CST
In force
2 hr
Issued by
the Storm Prediction Center

Counties Aransas County, TX, Bastrop County, TX, Bee County, TX, Caldwell County, TX, Calhoun County, TX, Colorado County, TX, DeWitt County, TX, Fayette County, TX, Goliad County, TX, Gonzales County, TX, Jackson County, TX, Karnes County, TX, Lavaca County, TX, Matagorda County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Victoria County, TX, Wharton County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 1.0 hours before the alert went out and 91 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 2004-02-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 795 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 2004-02-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
795 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
774 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.1

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
Feb 2, 2:20 AM CSTMesoscale DiscussionSPCAransas, Austin, Brazoria, Calhoun, Chambers, Colorado and 15 more85 min

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.