Alert archive / North Carolina / Mesoscale Discussions in 2018

Mesoscale Discussion 1452

September 14, 201824 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at Sep 14, 2018, 8:01 PM EDT for 24 counties in North Carolina. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Sep 14, 2018, 8:01 PM EDT (00:01 UTC)
Expired: Sep 14, 2018, 10:00 PM EDT
In force: 119 min
Issued by: the Storm Prediction Center

All 24 counties

Beaufort County, NC, Carteret County, NC, Craven County, NC, Cumberland County, NC, Dare County, NC, Duplin County, NC, Edgecombe County, NC, Greene County, NC, Harnett County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Pitt County, NC, Sampson County, NC, Tyrrell County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC

The radar

The Morehead City radar (KMHX), 50 km from the middle of the area, began a volume at 00:07 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 375Sep 14, 11:00 PM EDT

The nearest sounding before it

Newport, NC (KMHX), launched 00:00Z, 0.0 hours before the alert went out and 50 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: 522 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 546 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 14, 10:25 PM EDT	Mesoscale Discussion	SPC	Bladen, Brunswick, Carteret, Columbus, Craven, Cumberland and 11 more	95 min
Sep 14, 11:03 PM EDT	Tornado Watch	SPC	Bladen, Brunswick, Carteret, Columbus, Craven, Cumberland and 12 more	8 hr
Sep 15, 2:59 AM EDT	Mesoscale Discussion	SPC	Bladen, Brunswick, Carteret, Columbus, Craven, Cumberland and 12 more	91 min
Sep 15, 6:15 AM EDT	Mesoscale Discussion	SPC	Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 16 more	90 min
Sep 15, 6:59 AM EDT	Tornado Watch	SPC	Bladen, Brunswick, Columbus, Cumberland, Duplin, Greene and 14 more	10 hr
Sep 15, 12:01 PM EDT	Mesoscale Discussion	SPC	Bladen, Brunswick, Columbus, Craven, Cumberland, Duplin and 9 more	119 min
Sep 15, 3:26 PM EDT	Mesoscale Discussion	SPC	Pender	64 min
Sep 15, 4:38 PM EDT	Tornado Watch	SPC	Bladen, Brunswick, Columbus, Cumberland, Hoke, New Hanover and 4 more	6 hr

Nearby

Mesoscale Discussions in North Carolina, 2018 Every mesoscale discussion in 2018

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.