Alert archive / South Carolina / Mesoscale Discussions in 2005

Mesoscale Discussion 2348

October 21, 2005Burke County, Screven County, Georgia; 18 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Oct 21, 2005, 2:20 PM EDT for Burke County, Screven County, Georgia; 18 counties in South Carolina. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Oct 21, 2005, 2:20 PM EDT (18:20 UTC)
Expired: Oct 21, 2005, 4:15 PM EDT
In force: 115 min
Issued by: the Storm Prediction Center

Counties Burke County, GA, Screven County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dorchester County, SC, Florence County, SC, Hampton County, SC, Jasper County, SC, Kershaw County, SC, Lee County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Columbia radar (KCAE), 87 km from the middle of the area, began a volume at 18:22 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

Charleston AFB, SC (KCHS), launched 12:00Z, 6.3 hours before the alert went out and 71 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: 4 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1254 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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
Oct 21, 2:56 PM EDT	Mesoscale Discussion	SPC	Catoosa, Chattooga, Dade, Floyd, Gordon, Murray and 2 more	2 hr

Nearby

Mesoscale Discussions in South Carolina, 2005 Mesoscale Discussions in Georgia, 2005 Every mesoscale discussion in 2005

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.