Alert archive / South Carolina / Mesoscale Discussions in 2014

Mesoscale Discussion 854

June 6, 20146 counties in North Carolina; 15 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2014, 1:09 PM EDT for 6 counties in North Carolina; 15 counties in South Carolina. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 6, 2014, 1:09 PM EDT (17:09 UTC)
Expired: Jun 6, 2014, 3:45 PM EDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 21 counties

Bladen County, NC, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC, Robeson County, NC, Berkeley County, SC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Lee County, SC, Marion County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 112 km from the middle of the area, began a volume at 17:12 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, 5.2 hours before the alert went out and 100 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: 333 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 814 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 80 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
Jun 5, 10:13 PM EDT	Mesoscale Discussion	SPC	Aiken, Allendale, Barnwell, Edgefield, McCormick	92 min
Jun 6, 3:21 PM EDT	Mesoscale Discussion	SPC	Abbeville, McCormick	2 hr

Nearby

Mesoscale Discussions in South Carolina, 2014 Mesoscale Discussions in North Carolina, 2014 Every 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.