Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 498

April 6, 200526 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2005, 12:15 AM CDT for 26 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Apr 6, 2005, 12:15 AM CDT (05:15 UTC)
Expired: Apr 6, 2005, 1:45 AM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 26 counties

Aransas County, TX, Bee County, TX, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, DeWitt County, TX, Duval County, TX, Fort Bend County, TX, Goliad County, TX, Harris County, TX, Jackson County, TX, Jim Wells County, TX, Karnes County, TX, Kleberg County, TX, La Salle County, TX, Lavaca County, TX, Live Oak County, TX, Matagorda County, TX, McMullen County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Victoria County, TX, Webb County, TX, Wharton County, TX

The radar

The Corpus Christi radar (KCRP), 82 km from the middle of the area, began a volume at 05:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.3 hours before the alert went out and 84 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1351 J/kg
Mixed-layer CIN: -206 J/kg
Mixed-layer LCL: 956 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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.

Issued	Product	Office	Counties	Lasted
Apr 5, 7:10 PM CDT	Mesoscale Discussion	SPC	Bell, Brazos, Burleson, Falls, Grimes, Houston and 10 more	65 min
Apr 5, 8:25 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Austin, Bastrop, Bell, Bowie, Brazos and 43 more	8 hr
Apr 5, 10:40 PM CDT	Mesoscale Discussion	SPC	Jasper, Newton, Orange, Sabine	2 hr

Nearby

Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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; radar from the NEXRAD Level II archive.