Alert archive / North Carolina / Mesoscale Discussions in 2006

Mesoscale Discussion 1920

August 31, 200615 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at Aug 31, 2006, 11:59 PM EDT for 15 counties in North Carolina. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Aug 31, 2006, 11:59 PM EDT (03:59 UTC)
Expired: Sep 1, 2006, 1:30 AM EDT
In force: 91 min
Issued by: the Storm Prediction Center

Counties Beaufort County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Craven County, NC, Currituck County, NC, Dare County, NC, Hyde County, NC, Jones County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Perquimans County, NC, Tyrrell County, NC, Washington County, NC

The radar

The Morehead City radar (KMHX), 52 km from the middle of the area, began a volume at 04:02 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, 4.0 hours before the alert went out and 52 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: 66 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 321 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Sep 1, 2:55 AM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 12 more	2 hr
Sep 1, 4:35 AM EDT	Tornado Watch	SPC	Beaufort, Bertie, Camden, Chowan, Currituck, Dare and 8 more	9 hr
Sep 1, 7:45 AM EDT	Mesoscale Discussion	SPC	Camden, Currituck, Dare, Gates, Pasquotank, Tyrrell	2 hr

Nearby

Mesoscale Discussions in North Carolina, 2006 Every mesoscale discussion in 2006

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.