Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 36

January 7, 200727 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 7, 2007, 10:38 PM EST for 27 counties in Georgia. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jan 7, 2007, 10:38 PM EST (03:38 UTC)
Expired: Jan 7, 2007, 11:45 PM EST
In force: 67 min
Issued by: the Storm Prediction Center

All 27 counties

Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Calhoun County, GA, Clay County, GA, Crawford County, GA, Dooly County, GA, Early County, GA, Hancock County, GA, Houston County, GA, Jones County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Monroe County, GA, Peach County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Taylor County, GA, Terrell County, GA, Twiggs County, GA, Webster County, GA, Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 97 km from the middle of the area, began a volume at 03:41 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.6 hours before the alert went out and 130 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: 199 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 807 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 303 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.3

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
Jan 7, 8:18 PM EST	Mesoscale Discussion	SPC	Clarke, Elbert, Madison, Oconee, Oglethorpe, Wilkes	87 min
Jan 7, 8:44 PM EST	Tornado Watch	SPC	Burke, Columbia, Elbert, Hart, Lincoln, McDuffie and 1 more	3 hr

Nearby

Mesoscale Discussions in Georgia, 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.