Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 2407

November 17, 20049 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2004, 1:11 AM CST for 9 counties in Texas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Nov 17, 2004, 1:11 AM CST (07:11 UTC)
Expired: Nov 17, 2004, 2:45 AM CST
In force: 94 min
Issued by: the Storm Prediction Center

Counties Aransas County, TX, Bee County, TX, Calhoun County, TX, Goliad County, TX, Kleberg County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Victoria County, TX

The radar

The Corpus Christi radar (KCRP), 41 km from the middle of the area, began a volume at 07:12 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, 7.2 hours before the alert went out and 43 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: 1476 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 874 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.2

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
Nov 17, 9:36 AM CST	Mesoscale Discussion	SPC	Aransas, Austin, Brazoria, Brazos, Burleson, Calhoun and 27 more	114 min
Nov 17, 10:05 AM CST	Tornado Watch	SPC	Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 12 more	6 hr
Nov 17, 12:26 PM CST	Mesoscale Discussion	SPC	Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 11 more	94 min
Nov 17, 3:10 PM CST	Mesoscale Discussion	SPC	Brazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 7 more	65 min

Nearby

Mesoscale Discussions in Texas, 2004 Every 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; radar from the NEXRAD Level II archive.