Alert archive / North Carolina / Mesoscale Discussions in 2007

Mesoscale Discussion 467

April 12, 200741 counties in North Carolina; Dillon County, South Carolina; 8 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2007, 2:39 AM EDT for 41 counties in North Carolina; Dillon County, South Carolina; 8 counties in Virginia. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Apr 12, 2007, 2:39 AM EDT (06:39 UTC)
Expired
Apr 12, 2007, 3:45 AM EDT
In force
66 min
Issued by
the Storm Prediction Center
All 50 counties

Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Dare County, NC, Duplin County, NC, Edgecombe 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, New Hanover 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, Washington County, NC, Wayne County, NC, Wilson County, NC, Dillon County, SC, City of Chesapeake, VA, City of Franklin, VA, City of Norfolk, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, Isle of Wight County, VA, Southampton County, VA

The radar

The Morehead City radar (KMHX), 69 km from the middle of the area, began a volume at 06:38 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

Newport, NC (KMHX), launched 00:00Z, 6.7 hours before the alert went out and 69 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, Newport, NC at 00:00Z on 2007-04-12Temperature 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, Newport, NC at 00:00Z on 2007-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
609 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
446 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
Apr 12, 12:16 AM EDTMesoscale DiscussionSPCAlamance, Anson, Bladen, Cabarrus, Chatham, Cumberland and 31 more89 min
Apr 12, 12:55 AM EDTSevere Thunderstorm WatchSPCAlamance, Anson, Bertie, Bladen, Cabarrus, Caswell and 40 more3 hr
Apr 12, 3:25 AM EDTTornado WatchSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 36 more8 hr
Apr 12, 6:18 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 20 more57 min
Apr 12, 8:25 AM EDTMesoscale DiscussionSPCBeaufort, Camden, Carteret, Craven, Currituck, Dare and 6 more95 min
Apr 11, 9:39 PM EDTMesoscale DiscussionSPCAllendale, Bamberg, Beaufort, Colleton, Hampton, Jasper96 min
Apr 11, 10:43 PM EDTMesoscale DiscussionSPCAbbeville, Aiken, Anderson, Bamberg, Barnwell, Calhoun and 14 more62 min
Apr 11, 11:01 PM EDTSevere Thunderstorm WatchSPCAbbeville, Aiken, Allendale, Bamberg, Barnwell, Calhoun and 20 more6 hr
Apr 12, 4:01 AM EDTMesoscale DiscussionSPCAllendale, Bamberg, Beaufort, Berkeley, Charleston, Colleton and 4 more89 min

Nearby

Mesoscale Discussions in North Carolina, 2007Mesoscale Discussions in Virginia, 2007Mesoscale Discussions in South Carolina, 2007Every mesoscale discussion in 2007

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.