Alert archive / North Carolina / Mesoscale Discussions in 2007

Mesoscale Discussion 20

January 5, 200719 counties in North Carolina; Marlboro County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 5, 2007, 4:20 PM EST for 19 counties in North Carolina; Marlboro County, South Carolina. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jan 5, 2007, 4:20 PM EST (21:20 UTC)
Expired: Jan 5, 2007, 5:45 PM EST
In force: 85 min
Issued by: the Storm Prediction Center

Counties Alamance County, NC, Catawba County, NC, Chatham County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Guilford County, NC, Hoke County, NC, Iredell County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Randolph County, NC, Richmond County, NC, Rockingham County, NC, Rowan County, NC, Scotland County, NC, Stanly County, NC, Yadkin County, NC, Marlboro County, SC

The radar

The Raleigh/Durham radar (KRAX), 158 km from the middle of the area, began a volume at 21:20 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 8Jan 5, 5:55 PM EST

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.3 hours before the alert went out and 82 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: 25 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 586 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 176 m²/s²
0-3 km storm-relative helicity: 216 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
Jan 5, 12:41 PM EST	Tornado Watch	SPC	Cabarrus, Cleveland, Gaston, Lincoln, Mecklenburg, Union	8 hr
Jan 5, 3:04 PM EST	Mesoscale Discussion	SPC	Cleveland, Gaston, Mecklenburg, Union	86 min
Jan 5, 5:53 PM EST	Tornado Watch	SPC	Anson, Beaufort, Bladen, Brunswick, Carteret, Chatham and 34 more	7 hr
Jan 5, 12:06 PM EST	Mesoscale Discussion	SPC	Abbeville, Anderson, Chester, Fairfield, Greenville, Greenwood and 8 more
Jan 5, 2:16 PM EST	Mesoscale Discussion	SPC	Allendale, Beaufort, Colleton, Dorchester, Hampton, Jasper	119 min
Jan 5, 4:26 PM EST	Mesoscale Discussion	SPC	Allendale, Beaufort, Berkeley, Charleston, Colleton, Dorchester and 2 more	34 min
Jan 5, 4:35 PM EST	Tornado Watch	SPC	Allendale, Beaufort, Berkeley, Charleston, Colleton, Dorchester and 2 more	7 hr
Jan 5, 6:35 PM EST	Mesoscale Discussion	SPC	Allendale, Bamberg, Beaufort, Berkeley, Calhoun, Charleston and 11 more	85 min

Nearby

Mesoscale Discussions in North Carolina, 2007 Mesoscale Discussions in South Carolina, 2007 Every 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.