Alert archive / North Carolina / Mesoscale Discussions in 2008

Mesoscale Discussion 890

May 11, 200855 counties in North Carolina; 15 counties in South Carolina; 16 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at May 11, 2008, 1:39 PM EDT for 55 counties in North Carolina; 15 counties in South Carolina; 16 counties in Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2008, 1:39 PM EDT (17:39 UTC)
Expired
May 11, 2008, 3:45 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 86 counties

Alamance County, NC, Anson County, NC, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Cabarrus County, NC, Caswell County, NC, Chatham County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Orange County, NC, Pamlico County, NC, Pender County, NC, Perquimans County, NC, Person County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Richland County, SC, Sumter County, SC, Brunswick County, VA, Charlotte County, VA, City of Emporia, VA, City of Franklin, VA, City of Petersburg, VA, City of Suffolk, VA, Dinwiddie County, VA, Greensville County, VA, Halifax County, VA, Isle of Wight County, VA, Lunenburg County, VA, Mecklenburg County, VA, Nottoway County, VA, Prince Edward County, VA, Southampton County, VA, Sussex County, VA

The radar

The Raleigh/Durham radar (KRAX), 35 km from the middle of the area, began a volume at 17:43 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.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 5.7 hours before the alert went out and 106 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 2008-05-11Temperature 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 12:00Z on 2008-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939587897Sfc1 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
951 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
262 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
May 11, 9:34 AM EDTMesoscale DiscussionSPCAshe, Avery, Buncombe, Graham, Haywood, Madison and 4 more26 min
May 11, 9:52 AM EDTTornado WatchSPCAvery, Buncombe, Cherokee, Clay, Graham, Haywood and 8 more6 hr
May 11, 2:07 PM EDTTornado WatchSPCAlamance, Alexander, Anson, Bladen, Cabarrus, Caswell and 43 more6 hr
May 11, 2:33 PM EDTMesoscale DiscussionSPCAshe, Watauga57 min
May 11, 4:18 PM EDTMesoscale DiscussionSPCAlamance, Beaufort, Bertie, Chatham, Chowan, Cumberland and 26 more87 min
May 11, 4:43 PM EDTTornado WatchSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 23 more6 hr
May 11, 7:30 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 20 more90 min
May 11, 7:47 PM EDTSevere Thunderstorm WatchSPCAlamance, Anson, Chatham, Cumberland, Davidson, Durham and 20 more3 hr
May 10, 8:14 PM EDTMesoscale DiscussionSPCAiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 6 more2 hr
May 10, 9:54 PM EDTMesoscale DiscussionSPCAllendale, Bamberg, Barnwell, Beaufort, Colleton, Hampton and 1 more96 min
May 10, 10:06 PM EDTTornado WatchSPCAllendale, Beaufort, Colleton, Hampton, Jasper7 hr
May 11, 2:06 AM EDTMesoscale DiscussionSPCAiken, Allendale, Bamberg, Barnwell, Edgefield, Hampton and 2 more84 min
May 11, 2:37 AM EDTTornado WatchSPCAiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 12 more7 hr
May 11, 4:40 AM EDTMesoscale DiscussionSPCAbbeville, Aiken, Allendale, Bamberg, Barnwell, Beaufort and 14 more95 min
May 11, 7:24 AM EDTMesoscale DiscussionSPCAiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 13 more96 min
May 11, 8:51 AM EDTMesoscale DiscussionSPCAllendale, Bamberg, Barnwell, Beaufort, Berkeley, Calhoun and 5 more84 min
May 11, 2:42 PM EDTTornado WatchSPCBeaufort, Charleston, Colleton, Jasper5 hr
May 11, 7:06 PM EDTMesoscale DiscussionSPCBeaufort, Charleston, Colleton, Jasper84 min
May 11, 11:10 AM EDTMesoscale DiscussionSPCBuchanan, Dickenson, Russell, Scott, Smyth, Tazewell and 4 more95 min

Nearby

Mesoscale Discussions in North Carolina, 2008Mesoscale Discussions in Virginia, 2008Mesoscale Discussions in South Carolina, 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.