Alert archive / Georgia / Mesoscale Discussions in 2011

Mesoscale Discussion 2210

September 27, 201139 counties in Georgia; 7 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Sep 27, 2011, 4:16 PM EDT for 39 counties in Georgia; 7 counties in South Carolina. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Sep 27, 2011, 4:16 PM EDT (20:16 UTC)
Expired: Sep 27, 2011, 5:15 PM EDT
In force: 59 min
Issued by: the Storm Prediction Center

All 46 counties

Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Burke County, GA, Candler County, GA, Columbia County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Emanuel County, GA, Glascock County, GA, Hancock County, GA, Houston County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Laurens County, GA, Macon County, GA, McDuffie County, GA, Montgomery County, GA, Peach County, GA, Pulaski County, GA, Richmond County, GA, Schley County, GA, Screven County, GA, Sumter County, GA, Taylor County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Aiken County, SC, Allendale County, SC, Barnwell County, SC, Edgefield County, SC, Lexington County, SC, Richland County, SC, Saluda County, SC

The radar

The Robins AFB radar (KJGX), 41 km from the middle of the area, began a volume at 20:16 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 12:00Z, 8.3 hours before the alert went out and 164 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: 1343 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in Georgia, 2011 Mesoscale Discussions in South Carolina, 2011 Every mesoscale discussion in 2011

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.