Alert archive / South Carolina / Mesoscale Discussions in 2013

Mesoscale Discussion 1067

June 13, 201310 counties in Georgia; 29 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2013, 4:07 PM EDT for 10 counties in Georgia; 29 counties in South Carolina. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jun 13, 2013, 4:07 PM EDT (20:07 UTC)
Expired: Jun 13, 2013, 6:00 PM EDT
In force: 113 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 39 counties

Burke County, GA, Columbia County, GA, Glascock County, GA, Jefferson County, GA, Jenkins County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Screven County, GA, Warren County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Hampton County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Columbia radar (KCAE), 45 km from the middle of the area, began a volume at 20:08 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 311Jun 13, 6:25 PM EDT

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.1 hours before the alert went out and 306 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: 437 J/kg
Mixed-layer CIN: -333 J/kg
Mixed-layer LCL: 1862 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 26 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
Jun 13, 1:19 PM EDT	Mesoscale Discussion	SPC	Catoosa, Dade, Fannin, Gilmer, Murray, Rabun and 4 more	26 min
Jun 13, 1:40 PM EDT	Severe Thunderstorm Watch	SPC	Banks, Bartow, Catoosa, Chattooga, Cherokee, Dade and 23 more	7 hr
Jun 13, 4:15 PM EDT	Mesoscale Discussion	SPC	Baldwin, Barrow, Bibb, Butts, Carroll, Clarke and 37 more	90 min
Jun 13, 4:22 PM EDT	Mesoscale Discussion	SPC	Catoosa, Chattooga, Dade, Dawson, Fannin, Franklin and 13 more	53 min
Jun 13, 6:28 PM EDT	Severe Thunderstorm Watch	SPC	Baldwin, Barrow, Bibb, Burke, Butts, Carroll and 51 more	7 hr

Nearby

Mesoscale Discussions in South Carolina, 2013 Mesoscale Discussions in Georgia, 2013 Every mesoscale discussion in 2013

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.