Alert archive / South Carolina / Mesoscale Discussions in 2004

Mesoscale Discussion 558

May 2, 2004Screven County, Georgia; 17 counties in North Carolina; 24 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 2, 2004, 3:26 PM EDT for Screven County, Georgia; 17 counties in North Carolina; 24 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 2, 2004, 3:26 PM EDT (19:26 UTC)
Expired: May 2, 2004, 5:30 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 42 counties

Screven County, GA, Anson County, NC, Chatham County, NC, Cumberland County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Wake County, NC, Wayne County, NC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Greenwood County, SC, Hampton County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC

The watches that followed

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

Severe Thunderstorm Watch 148May 2, 4:50 PM EDT

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 7.4 hours before the alert went out and 149 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: 946 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 555 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
May 2, 2:37 AM EDT	Mesoscale Discussion	SPC	Baker, Calhoun, Chattahoochee, Clay, Decatur, Dougherty and 14 more	113 min
May 2, 11:32 AM EDT	Mesoscale Discussion	SPC	Camden, Glynn, McIntosh	2 hr
May 2, 12:33 PM EDT	Mesoscale Discussion	SPC	Baldwin, Bleckley, Bulloch, Burke, Candler, Columbia and 23 more	117 min
May 2, 1:10 PM EDT	Severe Thunderstorm Watch	SPC	Appling, Atkinson, Bacon, Ben Hill, Berrien, Bleckley and 45 more	6 hr
May 2, 4:50 PM EDT	Severe Thunderstorm Watch	SPC	Bryan, Chatham, Effingham, Liberty, Long	5 hr
May 2, 5:45 PM EDT	Severe Thunderstorm Watch	SPC	Gates	5 hr
May 2, 7:23 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Brunswick, Columbus, Craven and 24 more	67 min

Nearby

Mesoscale Discussions in South Carolina, 2004 Mesoscale Discussions in North Carolina, 2004 Mesoscale Discussions in Georgia, 2004 Every mesoscale discussion in 2004

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.