Alert archive / South Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 1573

July 2, 200314 counties in Georgia; 26 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2003, 12:25 AM EDT for 14 counties in Georgia; 26 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 2, 2003, 12:25 AM EDT (04:25 UTC)
Expired: Jul 2, 2003, 2:30 AM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 40 counties

Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Columbia County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Jenkins County, GA, Richmond County, GA, Screven County, GA, Tattnall County, GA, Toombs County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Clarendon County, SC, Colleton County, SC, Dorchester County, SC, Edgefield County, SC, Florence County, SC, Georgetown County, SC, Greenwood County, SC, Hampton County, SC, Jasper County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, McCormick County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Charleston,SC radar (KCLX), 44 km from the middle of the area, began a volume at 04:27 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 watches that followed

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

Tornado Watch 616Jul 2, 2:20 AM EDT

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 4.4 hours before the alert went out and 115 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: 257 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 769 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 287 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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
Jul 1, 8:12 PM EDT	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 100 more	2 hr
Jul 1, 9:55 PM EDT	Tornado Watch	SPC	Baldwin, Bleckley, Bryan, Bulloch, Burke, Candler and 32 more	6 hr
Jul 2, 2:20 AM EDT	Tornado Watch	SPC	Berkeley, Charleston, Colleton, Dillon, Dorchester, Florence and 4 more	7 hr
Jul 2, 5:32 AM EDT	Mesoscale Discussion	SPC	Berkeley, Charleston, Dillon, Dorchester, Florence, Georgetown and 3 more	58 min
Jul 2, 10:49 AM EDT	Mesoscale Discussion	SPC	Georgetown, Horry	116 min
Jul 2, 2:26 PM EDT	Mesoscale Discussion	SPC	Chesterfield, Darlington, Dillon, Florence, Marlboro	2 hr
Jul 2, 6:22 PM EDT	Mesoscale Discussion	SPC	Dillon, Marlboro	53 min
Jul 2, 7:50 PM EDT	Tornado Watch	SPC	Dillon	5 hr

Nearby

Mesoscale Discussions in South Carolina, 2003 Mesoscale Discussions in Georgia, 2003 Every mesoscale discussion in 2003

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.