Alert archive / North Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 2299

August 28, 200324 counties in North Carolina; 4 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 28, 2003, 1:59 PM EDT for 24 counties in North Carolina; 4 counties in Virginia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Aug 28, 2003, 1:59 PM EDT (17:59 UTC)
Expired: Aug 28, 2003, 4:30 PM EDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 28 counties

Beaufort County, NC, Bertie County, NC, Chowan County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Johnston County, NC, Lee County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Pitt County, NC, Tyrrell County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, City of Emporia, VA, City of Franklin, VA, Greensville County, VA, Southampton County, VA

The radar

The Raleigh/Durham radar (KRAX), 61 km from the middle of the area, began a volume at 18:03 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, 6.0 hours before the alert went out and 182 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: 2165 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1011 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: -24 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
Aug 28, 3:59 AM EDT	Mesoscale Discussion	SPC	Madison	2 hr
Aug 27, 9:19 PM EDT	Mesoscale Discussion	SPC	Accomack, Caroline, Charles City, Chesterfield, Dinwiddie, Essex and 27 more	56 min

Nearby

Mesoscale Discussions in North Carolina, 2003 Mesoscale Discussions in Virginia, 2003 Every mesoscale discussion in 2003

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.