Alert archive / North Carolina / Mesoscale Discussions in 2009

Mesoscale Discussion 2175

November 12, 20095 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at Nov 12, 2009, 4:52 AM EST for 5 counties in North Carolina. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Nov 12, 2009, 4:52 AM EST (09:52 UTC)
Expired: Nov 12, 2009, 5:45 AM EST
In force: 53 min
Issued by: the Storm Prediction Center

Counties Carteret County, NC, Dare County, NC, Hyde County, NC, Pamlico County, NC, Tyrrell County, NC

The radar

The Morehead City radar (KMHX), 101 km from the middle of the area, began a volume at 09:52 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 9.9 hours before the alert went out and 357 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 455 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 1184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Nov 12, 2:48 AM EST	Mesoscale Discussion	SPC	Beaufort, Carteret, Craven, Dare, Hyde, Pamlico	57 min

Nearby

Mesoscale Discussions in North Carolina, 2009 Every mesoscale discussion in 2009

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.