Alert archive / North Carolina / Mesoscale Discussions in 2006

Mesoscale Discussion 417

April 3, 200625 counties in North Carolina; 13 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2006, 9:34 AM EDT for 25 counties in North Carolina; 13 counties in South Carolina. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2006, 9:34 AM EDT (13:34 UTC)
Expired: Apr 3, 2006, 11:00 AM EDT
In force: 86 min
Issued by: the Storm Prediction Center

All 38 counties

Anson County, NC, Bladen County, NC, Chatham County, NC, Cumberland County, NC, Duplin County, NC, Edgecombe County, NC, Franklin County, NC, Greene County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Lenoir County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Pitt County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Union County, NC, Wake County, NC, Wayne County, NC, Wilson County, NC, Calhoun County, SC, Chesterfield County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marlboro County, SC, Richland County, SC, Sumter County, SC

The radar

The Raleigh/Durham radar (KRAX), 99 km from the middle of the area, began a volume at 13:37 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.

Tornado Watch 147Apr 3, 12:55 PM EDT

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 1.6 hours before the alert went out and 128 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1332 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 57 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.

Issued	Product	Office	Counties	Lasted
Apr 3, 3:16 AM EDT	Mesoscale Discussion	SPC	Buncombe, Burke, Cherokee, Clay, Graham, Haywood and 10 more	89 min
Apr 3, 3:47 AM EDT	Tornado Watch	SPC	Alexander, Avery, Buncombe, Burke, Caldwell, Catawba and 18 more	5 hr
Apr 3, 6:10 AM EDT	Mesoscale Discussion	SPC	Burke, Catawba, Clay, Cleveland, Gaston, Henderson and 8 more	2 hr
Apr 3, 12:54 PM EDT	Tornado Watch	SPC	Alexander, Buncombe, Burke, Cabarrus, Caldwell, Catawba and 20 more	7 hr
Apr 3, 2:36 PM EDT	Mesoscale Discussion	SPC	Alamance, Beaufort, Bertie, Camden, Caswell, Chatham and 37 more	114 min
Apr 3, 4:15 PM EDT	Tornado Watch	SPC	Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 56 more	7 hr
Apr 3, 4:59 PM EDT	Mesoscale Discussion	SPC	Alamance, Anson, Cabarrus, Catawba, Chatham, Cleveland and 19 more	91 min
Apr 3, 11:55 AM EDT	Mesoscale Discussion	SPC	Abbeville, Aiken, Anderson, Bamberg, Barnwell, Calhoun and 10 more	2 hr

Nearby

Mesoscale Discussions in North Carolina, 2006 Mesoscale Discussions in South Carolina, 2006 Every mesoscale discussion in 2006

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.