Alert archive / North Carolina / Mesoscale Discussions in 2014

Mesoscale Discussion 1272

July 4, 201416 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2014, 1:01 AM EDT for 16 counties in North Carolina. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jul 4, 2014, 1:01 AM EDT (05:01 UTC)
Expired: Jul 4, 2014, 3:00 AM EDT
In force: 119 min
Issued by: the Storm Prediction Center

Counties Beaufort County, NC, Bertie County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Currituck County, NC, Dare County, NC, Gates County, NC, Hertford County, NC, Hyde County, NC, Martin County, NC, Pamlico County, NC, Pasquotank County, NC, Perquimans County, NC, Tyrrell County, NC, Washington County, NC

The radar

The Morehead City radar (KMHX), 102 km from the middle of the area, began a volume at 05:03 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 00:00Z, 5.0 hours before the alert went out and 102 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: 683 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 600 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 241 m²/s²
0-3 km storm-relative helicity: 262 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.3

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
Jul 3, 9:23 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 26 more	67 min
Jul 3, 9:49 PM EDT	Tornado Watch	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 20 more	6 hr
Jul 4, 3:58 AM EDT	Mesoscale Discussion	SPC	Currituck	2 hr

Nearby

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.