Alert archive / North Carolina / Mesoscale Discussions in 2016

Mesoscale Discussion 1778

October 8, 20169 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at Oct 8, 2016, 2:23 PM EDT for 9 counties in North Carolina. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Oct 8, 2016, 2:23 PM EDT (18:23 UTC)
Expired: Oct 8, 2016, 4:00 PM EDT
In force: 97 min
Issued by: the Storm Prediction Center

Counties Beaufort County, NC, Carteret County, NC, Craven County, NC, Duplin County, NC, Hyde County, NC, Jones County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC

The radar

The Morehead City radar (KMHX), 9 km from the middle of the area, began a volume at 18:27 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 497Oct 8, 2:45 PM EDT

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 6.4 hours before the alert went out and 9 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: 206 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 769 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 333 m²/s²
0-3 km storm-relative helicity: 435 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.7

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
Oct 8, 7:00 AM EDT	Mesoscale Discussion	SPC	Brunswick, Carteret, New Hanover	60 min
Oct 8, 7:20 AM EDT	Tornado Watch	SPC	Brunswick, Carteret, Columbus, Craven, Duplin, Jones and 5 more	8 hr
Oct 8, 2:48 PM EDT	Tornado Watch	SPC	Beaufort, Carteret, Craven, Dare, Duplin, Hyde and 5 more	8 hr
Oct 8, 7:12 PM EDT	Mesoscale Discussion	SPC	Dare, Hyde, Tyrrell, Washington	2 hr

Nearby

Mesoscale Discussions in North Carolina, 2016 Every mesoscale discussion in 2016

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.