Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 2194

December 9, 2007Benton County, Carroll County, Washington County, Arkansas; 5 counties in Missouri; 7 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Dec 9, 2007, 12:00 PM CST for Benton County, Carroll County, Washington County, Arkansas; 5 counties in Missouri; 7 counties in Oklahoma. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Dec 9, 2007, 12:00 PM CST (18:00 UTC)
Expired: Dec 9, 2007, 3:30 PM CST
In force: 4 hr
Issued by: the Storm Prediction Center

Counties Benton County, AR, Carroll County, AR, Washington County, AR, Barry County, MO, Christian County, MO, McDonald County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Cherokee County, OK, Delaware County, OK, Haskell County, OK, McIntosh County, OK, Muskogee County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 104 km from the middle of the area, began a volume at 17:59 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

Springfield, MO (KSGF), launched 12:00Z, 6.0 hours before the alert went out and 83 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: 47 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 276 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 455 m²/s²
0-3 km storm-relative helicity: 497 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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, 11:27 PM CST	Mesoscale Discussion	SPC	Audrain, Barry, Barton, Bates, Benton, Boone and 44 more	6 hr
Dec 9, 5:41 AM CST	Mesoscale Discussion	SPC	Audrain, Boone, Callaway, Cole, Cooper, Franklin and 18 more	5 hr
Dec 9, 9:48 AM CST	Mesoscale Discussion	SPC	Barton, Jasper, Newton	2 hr
Dec 8, 10:57 PM CST	Mesoscale Discussion	SPC	Blaine, Caddo, Canadian, Cleveland, Comanche, Creek and 18 more	5 hr
Dec 9, 12:51 PM CST	Mesoscale Discussion	SPC	Jackson, Tillman	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 Oklahoma, 2007 Mesoscale Discussions in Missouri, 2007 Mesoscale Discussions in Arkansas, 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.