Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 2374

September 11, 200326 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 11, 2003, 12:53 PM CDT for 26 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Sep 11, 2003, 12:53 PM CDT (17:53 UTC)
Expired: Sep 11, 2003, 3:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 26 counties

Bosque County, TX, Brown County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Dallas County, TX, Delta County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, McLennan County, TX, Mills County, TX, Navarro County, TX, Rains County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 35 km from the middle of the area, began a volume at 17:54 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

Fort Worth, TX (KFWD), launched 12:00Z, 5.9 hours before the alert went out and 54 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: 1288 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Sep 10, 8:10 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Carson, Collingsworth, Donley, Gray, Hemphill and 4 more	5 hr
Sep 10, 11:40 PM CDT	Mesoscale Discussion	SPC	Armstrong, Collingsworth, Donley, Gray, Hemphill, Lipscomb and 3 more	2 hr
Sep 11, 1:54 AM CDT	Mesoscale Discussion	SPC	Childress, Cottle, Floyd, Foard, Hall, Hardeman and 1 more	3 hr

Nearby

Mesoscale Discussions in Texas, 2003 Every mesoscale discussion in 2003

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.