Alert archive / North Carolina / Mesoscale Discussions in 2008

Mesoscale Discussion 342

March 4, 200840 counties in North Carolina; 16 counties in South Carolina; 12 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Mar 4, 2008, 6:33 AM EST for 40 counties in North Carolina; 16 counties in South Carolina; 12 counties in Virginia. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Mar 4, 2008, 6:33 AM EST (11:33 UTC)
Expired
Mar 4, 2008, 8:00 AM EST
In force
87 min
Issued by
the Storm Prediction Center
All 68 counties

Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Duplin County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Tyrrell County, NC, Wake County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Berkeley County, SC, Calhoun County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC, Charles City County, VA, City of Chesapeake, VA, City of Emporia, VA, City of Franklin, VA, City of Portsmouth, VA, City of Suffolk, VA, Greensville County, VA, Isle of Wight County, VA, Prince George County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA

The radar

The Raleigh/Durham radar (KRAX), 54 km from the middle of the area, began a volume at 11:35 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, 11.6 hours before the alert went out and 185 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 00:00Z on 2008-03-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2008-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1821 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
299 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.

IssuedProductOfficeCountiesLasted
Mar 4, 11:17 AM ESTMesoscale DiscussionSPCBuncombe, Cherokee, Clay, Graham, Haywood, Henderson and 6 more118 min
Mar 4, 12:04 PM ESTTornado WatchSPCBuncombe, Cherokee, Clay, Graham, Haywood, Henderson and 5 more8 hr
Mar 4, 2:03 PM ESTMesoscale DiscussionSPCAnson, Cabarrus, Cleveland, Gaston, Lincoln, Mecklenburg and 2 more117 min
Mar 4, 2:30 PM ESTMesoscale DiscussionSPCCherokee, Clay, Graham, Haywood, Jackson, Macon and 2 more90 min
Mar 4, 4:31 PM ESTTornado WatchSPCAlamance, Alexander, Alleghany, Anson, Ashe, Avery and 53 more8 hr
Mar 4, 5:48 PM ESTMesoscale DiscussionSPCBladen, Brunswick, Columbus, Robeson57 min
Mar 4, 5:53 PM ESTTornado WatchSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 18 more9 hr
Mar 4, 6:27 PM ESTTornado WatchSPCBladen, Brunswick, Columbus, New Hanover, Pender, Robeson7 hr
Mar 4, 11:56 AM ESTMesoscale DiscussionSPCAllendale2 hr
Mar 4, 2:27 PM ESTSevere Thunderstorm WatchSPCBland, Buchanan, Carroll, Dickenson, Giles, Grayson and 12 more6 hr
Mar 4, 4:11 PM ESTMesoscale DiscussionSPCBuchanan, Dickenson, Wise, City of Norton94 min

Nearby

Mesoscale Discussions in North Carolina, 2008Mesoscale Discussions in South Carolina, 2008Mesoscale Discussions in Virginia, 2008Every mesoscale discussion in 2008

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.