Alert archive / North Carolina / Mesoscale Discussions in 2014

Mesoscale Discussion 26

January 11, 201411 counties in North Carolina; 4 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 11, 2014, 4:37 PM EST for 11 counties in North Carolina; 4 counties in South Carolina. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jan 11, 2014, 4:37 PM EST (21:37 UTC)
Expired: Jan 11, 2014, 5:30 PM EST
In force: 53 min
Issued by: the Storm Prediction Center

Counties Beaufort County, NC, Brunswick County, NC, Carteret County, NC, Columbus County, NC, Craven County, NC, Hyde County, NC, Jones County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Berkeley County, SC, Charleston County, SC, Georgetown County, SC, Horry County, SC

The radar

The Wilmington radar (KLTX), 65 km from the middle of the area, began a volume at 21:37 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, 9.6 hours before the alert went out and 113 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: 590 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 670 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.1

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
Jan 11, 9:22 AM EST	Mesoscale Discussion	SPC	Cleveland, Henderson, Polk	23 min
Jan 11, 9:30 AM EST	Severe Thunderstorm Watch	SPC	Cabarrus, Cleveland, Gaston, Lincoln, Mecklenburg, Polk and 2 more	6 hr
Jan 11, 11:12 AM EST	Mesoscale Discussion	SPC	Alamance, Anson, Caswell, Chatham, Cumberland, Durham and 22 more	63 min
Jan 11, 11:50 AM EST	Tornado Watch	SPC	Alamance, Anson, Bladen, Chatham, Cumberland, Durham and 24 more	6 hr
Jan 11, 2:04 PM EST	Mesoscale Discussion	SPC	Beaufort, Bladen, Brunswick, Carteret, Chatham, Columbus and 34 more	56 min
Jan 11, 2:13 PM EST	Tornado Watch	SPC	Beaufort, Brunswick, Carteret, Columbus, Craven, Dare and 13 more	5 hr
Jan 11, 2:30 PM EST	Tornado Watch	SPC	Bertie, Camden, Chowan, Currituck, Gates, Hertford and 3 more	4 hr
Jan 11, 4:14 PM EST	Mesoscale Discussion	SPC	Bertie, Camden, Chowan, Currituck, Edgecombe, Gates and 6 more	61 min
Jan 11, 12:17 PM EST	Mesoscale Discussion	SPC	Allendale, Hampton	58 min
Jan 11, 1:51 PM EST	Tornado Watch	SPC	Allendale, Beaufort, Berkeley, Charleston, Colleton, Dorchester and 2 more	3 hr
Jan 11, 3:35 PM EST	Mesoscale Discussion	SPC	Beaufort, Berkeley, Charleston, Colleton, Dorchester, Hampton and 1 more	55 min

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.