Alert archive / North Carolina / Mesoscale Discussions in 2005

Mesoscale Discussion 722

April 30, 200549 counties in North Carolina; 35 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2005, 9:19 AM EDT for 49 counties in North Carolina; 35 counties in South Carolina. It was in force for 26 min.

The area

The outline as issued.

The facts

Issued
Apr 30, 2005, 9:19 AM EDT (13:19 UTC)
Expired
Apr 30, 2005, 9:45 AM EDT
In force
26 min
Issued by
the Storm Prediction Center
All 84 counties

Alamance County, NC, Anson County, NC, Bladen County, NC, Cabarrus County, NC, Caswell County, NC, Catawba County, NC, Chatham County, NC, Cleveland County, NC, Columbus County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Gaston County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Iredell County, NC, Johnston County, NC, Lee County, NC, Lincoln County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rockingham County, NC, Rowan County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Stokes County, NC, Union County, NC, Vance County, NC, Wake County, NC, Wayne County, NC, Wilson County, NC, Yadkin County, NC, Abbeville County, SC, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Greenwood County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC

The radar

The Columbia radar (KCAE), 145 km from the middle of the area, began a volume at 13:19 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

Charleston AFB, SC (KCHS), launched 12:00Z, 1.3 hours before the alert went out and 221 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, Charleston AFB, SC at 12:00Z on 2005-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 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, Charleston AFB, SC at 12:00Z on 2005-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.19395878Sfc1 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
84 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
788 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
101 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
Apr 29, 10:23 PM EDTMesoscale DiscussionSPCGraham97 min
Apr 30, 2:08 AM EDTMesoscale DiscussionSPCGraham67 min
Apr 30, 9:40 AM EDTSevere Thunderstorm WatchSPCAlamance, Anson, Bladen, Cabarrus, Caswell, Chatham and 29 more6 hr
Apr 30, 11:25 AM EDTMesoscale DiscussionSPCAlamance, Anson, Bertie, Bladen, Chatham, Columbus and 29 more2 hr
Apr 30, 1:17 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Currituck, Edgecombe and 15 more118 min
Apr 30, 3:21 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Chowan, Columbus, Craven and 14 more54 min
Apr 30, 3:25 PM EDTMesoscale DiscussionSPCGraham95 min
Apr 30, 7:41 AM EDTMesoscale DiscussionSPCAiken, Allendale, Barnwell94 min

Nearby

Mesoscale Discussions in North Carolina, 2005Mesoscale Discussions in South Carolina, 2005Every mesoscale discussion in 2005

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.