Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 60

January 11, 200820 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 11, 2008, 4:27 AM EST for 20 counties in Georgia. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Jan 11, 2008, 4:27 AM EST (09:27 UTC)
Expired: Jan 11, 2008, 5:30 AM EST
In force: 63 min
Issued by: the Storm Prediction Center

Counties Bleckley County, GA, Calhoun County, GA, Clay County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Glascock County, GA, Houston County, GA, Jefferson County, GA, Johnson County, GA, Laurens County, GA, Lee County, GA, Pulaski County, GA, Randolph County, GA, Sumter County, GA, Terrell County, GA, Washington County, GA, Webster County, GA, Wilcox County, GA, Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 30 km from the middle of the area, began a volume at 09:27 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, 9.5 hours before the alert went out and 144 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: 32 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 297 m²/s²
0-3 km storm-relative helicity: 349 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Jan 10, 7:29 PM EST	Mesoscale Discussion	SPC	Bartow, Catoosa, Chattooga, Cherokee, Dawson, Fannin and 12 more	61 min
Jan 10, 8:52 PM EST	Mesoscale Discussion	SPC	Bartow, Carroll, Catoosa, Chattahoochee, Chattooga, Cherokee and 29 more	53 min
Jan 10, 10:38 PM EST	Mesoscale Discussion	SPC	Chattahoochee, Harris, Meriwether, Muscogee, Stewart, Troup	67 min
Jan 11, 12:18 AM EST	Mesoscale Discussion	SPC	Bibb, Bleckley, Calhoun, Chattahoochee, Clay, Crawford and 23 more	87 min
Jan 11, 12:55 AM EST	Tornado Watch	SPC	Baldwin, Bibb, Bleckley, Chattahoochee, Clay, Crawford and 39 more	6 hr
Jan 11, 2:21 AM EST	Tornado Watch	SPC	Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 16 more	7 hr
Jan 11, 3:05 AM EST	Mesoscale Discussion	SPC	Baldwin, Burke, Columbia, Emanuel, Glascock, Greene and 13 more	85 min
Jan 11, 5:30 AM EST	Mesoscale Discussion	SPC	Baker, Berrien, Brooks, Calhoun, Colquitt, Cook and 13 more	90 min

Nearby

Mesoscale Discussions in Georgia, 2008 Every mesoscale discussion in 2008

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.