Alert archive / South Carolina / Mesoscale Discussions in 2014

Mesoscale Discussion 669

May 23, 20145 counties in Georgia; 27 counties in North Carolina; 37 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 23, 2014, 2:27 PM EDT for 5 counties in Georgia; 27 counties in North Carolina; 37 counties in South Carolina. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 23, 2014, 2:27 PM EDT (18:27 UTC)
Expired
May 23, 2014, 4:00 PM EDT
In force
93 min
Issued by
the Storm Prediction Center
All 69 counties

Habersham County, GA, Hart County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Beaufort County, NC, Bladen County, NC, Brunswick County, NC, Carteret County, NC, Clay County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Greene County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Macon County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Transylvania County, NC, Wayne County, NC, Wilson County, NC, Abbeville County, SC, Aiken County, SC, Anderson County, SC, Berkeley County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Greenville County, SC, Greenwood County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Oconee County, SC, Orangeburg County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC

The radar

The Columbia radar (KCAE), 79 km from the middle of the area, began a volume at 18:30 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.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.5 hours before the alert went out and 184 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2014-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 106 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2014-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
106 J/kg
Mixed-layer CIN
-255 J/kg
Mixed-layer LCL
1427 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
36 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.

IssuedProductOfficeCountiesLasted
May 23, 2:56 PM EDTSevere Thunderstorm WatchSPCColumbia, Elbert, Franklin, Habersham, Hart, Lincoln and 3 more6 hr
May 23, 7:08 PM EDTMesoscale DiscussionSPCColumbia, Elbert, Habersham, Hart, Lincoln, Rabun and 2 more97 min
May 23, 11:46 AM EDTMesoscale DiscussionSPCAnson, Bladen, Brunswick, Columbus, Craven, Cumberland and 17 more2 hr
May 23, 1:07 PM EDTSevere Thunderstorm WatchSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 27 more10 hr
May 23, 4:14 PM EDTMesoscale DiscussionSPCAnson, Bladen, Brunswick, Columbus, Cumberland, Duplin and 10 more91 min

Nearby

Mesoscale Discussions in South Carolina, 2014Mesoscale Discussions in North Carolina, 2014Mesoscale Discussions in Georgia, 2014Every mesoscale discussion in 2014

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.