Alert archive / North Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 1177

May 31, 200310 counties in North Carolina; Horry County, Marion County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 31, 2003, 9:57 PM EDT for 10 counties in North Carolina; Horry County, Marion County, South Carolina. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: May 31, 2003, 9:57 PM EDT (01:57 UTC)
Expired: May 31, 2003, 11:00 PM EDT
In force: 63 min
Issued by: the Storm Prediction Center

Counties Brunswick County, NC, Carteret County, NC, Columbus County, NC, Dare County, NC, Hyde County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Tyrrell County, NC, Horry County, SC, Marion County, SC

The radar

The Morehead City radar (KMHX), 47 km from the middle of the area, began a volume at 02:00 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 00:00Z, 2.0 hours before the alert went out and 275 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: 16 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1767 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 30 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
May 31, 8:05 PM EDT	Tornado Watch	SPC	Beaufort, Bertie, Bladen, Camden, Carteret, Chowan and 25 more	3 hr

Nearby

Mesoscale Discussions in North Carolina, 2003 Mesoscale Discussions in South Carolina, 2003 Every mesoscale discussion in 2003

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.