Alert archive / North Carolina / Mesoscale Discussions in 2015

Mesoscale Discussion 384

April 19, 201518 counties in North Carolina; 8 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2015, 7:11 PM EDT for 18 counties in North Carolina; 8 counties in South Carolina. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Apr 19, 2015, 7:11 PM EDT (23:11 UTC)
Expired: Apr 19, 2015, 8:45 PM EDT
In force: 94 min
Issued by: the Storm Prediction Center

All 26 counties

Bladen County, NC, Brunswick County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Greene County, NC, Harnett County, NC, Hoke County, NC, Jones County, NC, Lenoir County, NC, New Hanover County, NC, Onslow County, NC, Pender County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Wayne County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Marlboro County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 53 km from the middle of the area, began a volume at 23:11 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, 11.2 hours before the alert went out and 218 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: 52 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 945 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 156 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
Apr 19, 1:04 PM EDT	Tornado Watch	SPC	Cabarrus, Gaston, Mecklenburg, Union	7 hr
Apr 19, 4:11 PM EDT	Mesoscale Discussion	SPC	Anson, Cabarrus, Catawba, Cleveland, Davie, Gaston and 7 more	2 hr
Apr 19, 5:01 PM EDT	Tornado Watch	SPC	Anson, Bladen, Brunswick, Chatham, Columbus, Cumberland and 16 more	6 hr
Apr 19, 6:25 PM EDT	Mesoscale Discussion	SPC	Cherokee	95 min
Apr 19, 12:24 PM EDT	Mesoscale Discussion	SPC	Aiken, Allendale, Bamberg, Barnwell, Hampton, Jasper	2 hr

Nearby

Mesoscale Discussions in North Carolina, 2015 Mesoscale Discussions in South Carolina, 2015 Every mesoscale discussion in 2015

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.