Alert archive / North Carolina / Mesoscale Discussions in 2014

Mesoscale Discussion 82

February 11, 201417 counties in North Carolina; 11 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Feb 11, 2014, 8:21 AM EST for 17 counties in North Carolina; 11 counties in South Carolina. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Feb 11, 2014, 8:21 AM EST (13:21 UTC)
Expired: Feb 11, 2014, 2:15 PM EST
In force: 6 hr
Issued by: the Storm Prediction Center

All 28 counties

Bladen County, NC, Brunswick County, NC, Carteret County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Hoke County, NC, Jones County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Chester County, SC, Chesterfield County, SC, Darlington County, SC, Dillon County, SC, Florence County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC

The radar

The Wilmington radar (KLTX), 64 km from the middle of the area, began a volume at 13:23 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 1.4 hours before the alert went out and 204 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1179 m above ground
0-6 km bulk shear: 84 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 179 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
Feb 11, 8:20 AM EST	Mesoscale Discussion	SPC	Cleveland, Gaston, Mecklenburg, Union	5 hr
Feb 11, 3:10 PM EST	Mesoscale Discussion	SPC	Bladen, Brunswick, Columbus, Duplin, Jones, New Hanover and 3 more	5 hr

Nearby

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