Alert archive / North Carolina / Mesoscale Discussions in 2004

Mesoscale Discussion 1394

June 23, 200457 counties in North Carolina; Marlboro County, South Carolina; 9 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2004, 4:03 PM EDT for 57 counties in North Carolina; Marlboro County, South Carolina; 9 counties in Virginia. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Jun 23, 2004, 4:03 PM EDT (20:03 UTC)
Expired
Jun 23, 2004, 5:30 PM EDT
In force
87 min
Issued by
the Storm Prediction Center
All 67 counties

Alamance County, NC, Anson County, NC, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Camden County, NC, Caswell County, NC, Chatham County, NC, Chowan County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Davidson County, NC, Duplin 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, 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, Northampton County, NC, Onslow County, NC, Orange County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Person County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rockingham County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Tyrrell County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Marlboro County, SC, Brunswick County, VA, City of Chesapeake, VA, City of Emporia, VA, City of Franklin, VA, City of Suffolk, VA, Greensville County, VA, Isle of Wight County, VA, Mecklenburg County, VA, Southampton County, VA

The radar

The Raleigh/Durham radar (KRAX), 16 km from the middle of the area, began a volume at 20:05 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, 8.1 hours before the alert went out and 126 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 2004-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 204 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 2004-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 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
204 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
1036 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
18 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

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
Jun 23, 12:55 PM EDTMesoscale DiscussionSPCAlamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 57 more2 hr
Jun 23, 2:20 PM EDTSevere Thunderstorm WatchSPCAlamance, Bertie, Camden, Caswell, Chatham, Chowan and 20 more7 hr
Jun 23, 4:25 PM EDTSevere Thunderstorm WatchSPCAnson, Beaufort, Carteret, Craven, Cumberland, Dare and 19 more5 hr
Jun 23, 6:30 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Craven, Cumberland and 27 more90 min
Jun 23, 5:12 PM EDTMesoscale DiscussionSPCBeaufort, Jasper93 min

Nearby

Mesoscale Discussions in North Carolina, 2004Mesoscale Discussions in Virginia, 2004Mesoscale Discussions in South Carolina, 2004Every mesoscale discussion in 2004

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.