Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 2196

December 9, 2007Jackson County, Tillman County, Oklahoma; 12 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Dec 9, 2007, 12:51 PM CST for Jackson County, Tillman County, Oklahoma; 12 counties in Texas. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Dec 9, 2007, 12:51 PM CST (18:51 UTC)
Expired: Dec 9, 2007, 4:45 PM CST
In force: 4 hr
Issued by: the Storm Prediction Center

Counties Jackson County, OK, Tillman County, OK, Baylor County, TX, Fisher County, TX, Foard County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, King County, TX, Knox County, TX, Nolan County, TX, Scurry County, TX, Stonewall County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 112 km from the middle of the area, began a volume at 18:51 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 6.9 hours before the alert went out and 269 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: 22 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 374 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 236 m²/s²
0-3 km storm-relative helicity: 294 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
Dec 8, 10:57 PM CST	Mesoscale Discussion	SPC	Blaine, Caddo, Canadian, Cleveland, Comanche, Creek and 18 more	5 hr
Dec 8, 11:27 PM CST	Mesoscale Discussion	SPC	Craig, Ottawa	6 hr
Dec 9, 9:48 AM CST	Mesoscale Discussion	SPC	Craig, Nowata, Osage, Ottawa, Pawnee, Rogers and 2 more	2 hr
Dec 9, 12:00 PM CST	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Haskell, McIntosh, Muskogee and 1 more	4 hr
Dec 9, 5:56 PM CST	Mesoscale Discussion	SPC	Caddo, Canadian, Cleveland, Comanche, Craig, Creek and 22 more	5 hr

Nearby

Mesoscale Discussions in Texas, 2007 Mesoscale Discussions in Oklahoma, 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.