Alert archive / South Carolina / Mesoscale Discussions in 2008

Mesoscale Discussion 1139

June 1, 20088 counties in North Carolina; 11 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2008, 1:39 PM EDT for 8 counties in North Carolina; 11 counties in South Carolina. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2008, 1:39 PM EDT (17:39 UTC)
Expired: Jun 1, 2008, 2:45 PM EDT
In force: 66 min
Issued by: the Storm Prediction Center

Counties Bladen County, NC, Brunswick County, NC, Columbus County, NC, Duplin County, NC, New Hanover County, NC, Onslow County, NC, Pender County, NC, Robeson County, NC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Marlboro County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 114 km from the middle of the area, began a volume at 17:43 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

Charleston AFB, SC (KCHS), launched 12:00Z, 5.7 hours before the alert went out and 90 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: 2130 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 830 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 35 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
Jun 1, 5:22 AM EDT	Mesoscale Discussion	SPC	Cherokee, Graham	113 min
Jun 1, 6:09 PM EDT	Mesoscale Discussion	SPC	Alamance, Beaufort, Bertie, Bladen, Brunswick, Camden and 48 more	96 min
Jun 1, 6:58 PM EDT	Mesoscale Discussion	SPC	Alleghany	92 min

Nearby

Mesoscale Discussions in South Carolina, 2008 Mesoscale Discussions in North Carolina, 2008 Every mesoscale discussion in 2008

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.