Alert archive / North Carolina / Mesoscale Discussions in 2013

Mesoscale Discussion 988

June 7, 201329 counties in North Carolina; 13 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2013, 8:35 AM EDT for 29 counties in North Carolina; 13 counties in Virginia. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jun 7, 2013, 8:35 AM EDT (12:35 UTC)
Expired: Jun 7, 2013, 10:00 AM EDT
In force: 85 min
Issued by: the Storm Prediction Center

All 42 counties

Beaufort County, NC, Bertie County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Craven County, NC, Currituck County, NC, Dare County, NC, Duplin County, NC, Edgecombe County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Hertford County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Tyrrell County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, City of Chesapeake, VA, City of Franklin, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, Isle of Wight County, VA, Northampton County, VA, Southampton County, VA, York County, VA

The radar

The Morehead City radar (KMHX), 96 km from the middle of the area, began a volume at 12:38 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

Newport, NC (KMHX), launched 12:00Z, 0.6 hours before the alert went out and 96 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: 1046 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 615 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 198 m²/s²
0-3 km storm-relative helicity: 242 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.2

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 7, 12:49 AM EDT	Mesoscale Discussion	SPC	Brunswick, New Hanover	56 min
Jun 7, 3:34 AM EDT	Mesoscale Discussion	SPC	Beaufort, Carteret, Craven, Dare, Hyde, Jones and 4 more	2 hr
Jun 7, 5:37 AM EDT	Tornado Watch	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 23 more	7 hr
Jun 7, 11:26 AM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Camden, Carteret, Chowan and 22 more	64 min
Jun 7, 1:00 PM EDT	Tornado Watch	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 19 more	7 hr
Jun 7, 3:32 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 19 more	58 min
Jun 7, 6:40 PM EDT	Mesoscale Discussion	SPC	Bertie, Camden, Chowan, Currituck, Gates, Hertford and 3 more	2 hr

Nearby

Mesoscale Discussions in North Carolina, 2013 Mesoscale Discussions in Virginia, 2013 Every mesoscale discussion in 2013

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.