Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 2084

October 15, 200728 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 15, 2007, 7:52 AM CDT for 28 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Oct 15, 2007, 7:52 AM CDT (12:52 UTC)
Expired: Oct 15, 2007, 10:15 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 28 counties

Anderson County, TX, Bosque County, TX, Camp County, TX, Coryell County, TX, Dallas County, TX, Ellis County, TX, Falls County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Limestone County, TX, McLennan County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Rockwall County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 81 km from the middle of the area, began a volume at 12:53 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, 0.9 hours before the alert went out and 97 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: 1780 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 9.1

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.

Issued	Product	Office	Counties	Lasted
Oct 14, 7:28 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Wichita, Wilbarger	62 min
Oct 15, 2:30 AM CDT	Mesoscale Discussion	SPC	Collin, Cooke, Dallas, Delta, Denton, Fannin and 13 more	3 hr
Oct 15, 4:34 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Concho, Crockett and 13 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2007 Every mesoscale discussion in 2007

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.