Alert archive / South Carolina / Mesoscale Discussions in 2006

Mesoscale Discussion 536

April 17, 20066 counties in North Carolina; 8 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2006, 4:56 PM EDT for 6 counties in North Carolina; 8 counties in South Carolina. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Apr 17, 2006, 4:56 PM EDT (20:56 UTC)
Expired: Apr 17, 2006, 6:00 PM EDT
In force: 64 min
Issued by: the Storm Prediction Center

Counties Bladen County, NC, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Onslow County, NC, Pender County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Marion County, SC

The radar

The Wilmington radar (KLTX), 74 km from the middle of the area, began a volume at 20:57 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 nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.9 hours before the alert went out and 208 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: 1287 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 79 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 17, 11:31 AM EDT	Severe Thunderstorm Watch	SPC	Alexander, Alleghany, Ashe, Avery, Burke, Cabarrus and 24 more	5 hr
Apr 17, 1:37 PM EDT	Mesoscale Discussion	SPC	Alamance, Alexander, Anson, Bladen, Brunswick, Burke and 46 more	113 min
Apr 17, 2:10 PM EDT	Severe Thunderstorm Watch	SPC	Alamance, Anson, Bladen, Brunswick, Carteret, Chatham and 32 more	5 hr
Apr 17, 6:26 PM EDT	Mesoscale Discussion	SPC	Darlington, Florence, Georgetown, Horry, Lee, Marion and 1 more	94 min

Nearby

Mesoscale Discussions in South Carolina, 2006 Mesoscale Discussions in North 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.