Alert archive / North Carolina / Mesoscale Discussions in 2007

Mesoscale Discussion 1966

September 14, 200743 counties in North Carolina; 18 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Sep 14, 2007, 4:06 PM EDT for 43 counties in North Carolina; 18 counties in Virginia. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Sep 14, 2007, 4:06 PM EDT (20:06 UTC)
Expired
Sep 14, 2007, 5:30 PM EDT
In force
84 min
Issued by
the Storm Prediction Center
All 61 counties

Alamance County, NC, Alexander County, NC, Beaufort County, NC, Bertie County, NC, Cabarrus County, NC, Caswell County, NC, Catawba County, NC, Chatham County, NC, Chowan County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Hertford County, NC, Iredell County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Pasquotank County, NC, Perquimans County, NC, Person County, NC, Pitt County, NC, Randolph County, NC, Rockingham County, NC, Rowan County, NC, Stanly County, NC, Stokes County, NC, Surry County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wilkes County, NC, Wilson County, NC, Yadkin County, NC, Brunswick County, VA, Charlotte County, VA, City of Danville, VA, City of Emporia, VA, City of Franklin, VA, City of Martinsville, VA, City of Suffolk, VA, Greensville County, VA, Halifax County, VA, Henry County, VA, Isle of Wight County, VA, Lunenburg County, VA, Mecklenburg County, VA, Patrick County, VA, Pittsylvania County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA

The radar

The Raleigh/Durham radar (KRAX), 67 km from the middle of the area, began a volume at 20:09 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 12:00Z, 8.1 hours before the alert went out and 85 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2007-09-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 384 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2007-09-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
384 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
591 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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.

IssuedProductOfficeCountiesLasted
Sep 14, 7:44 PM EDTMesoscale DiscussionSPCEdgecombe, Greene, Harnett, Johnston, Martin, Nash and 4 more61 min

Nearby

Mesoscale Discussions in North Carolina, 2007Mesoscale Discussions in Virginia, 2007Every mesoscale discussion in 2007

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.