Alert archive / North Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 1164

May 31, 200322 counties in North Carolina; Cherokee County, Lancaster County, York County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 31, 2003, 12:50 PM EDT for 22 counties in North Carolina; Cherokee County, Lancaster County, York County, South Carolina. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: May 31, 2003, 12:50 PM EDT (16:50 UTC)
Expired: May 31, 2003, 2:45 PM EDT
In force: 115 min
Issued by: the Storm Prediction Center

All 25 counties

Alamance County, NC, Anson County, NC, Cabarrus County, NC, Catawba County, NC, Chatham County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Gaston County, NC, Guilford County, NC, Iredell County, NC, Lincoln County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Randolph County, NC, Rockingham County, NC, Rowan County, NC, Stanly County, NC, Union County, NC, Cherokee County, SC, Lancaster County, SC, York County, SC

The radar

The Greer radar (KGSP), 161 km from the middle of the area, began a volume at 16:52 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 4.8 hours before the alert went out and 95 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: 1484 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 166 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, 1:25 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Chowan, Craven, Edgecombe and 16 more	2 hr
May 31, 2:05 PM EDT	Tornado Watch	SPC	Alamance, Anson, Beaufort, Bertie, Cabarrus, Camden and 57 more	6 hr
May 31, 2:41 PM EDT	Mesoscale Discussion	SPC	Columbus, Robeson	2 hr
May 31, 2:55 PM EDT	Tornado Watch	SPC	Bladen, Brunswick, Columbus, New Hanover, Pender, Robeson and 1 more	5 hr
May 31, 4:37 PM EDT	Mesoscale Discussion	SPC	Alamance, Anson, Bladen, Chatham, Craven, Cumberland and 36 more	113 min
May 31, 6:12 PM EDT	Mesoscale Discussion	SPC	Bladen, Brunswick, Chatham, Columbus, Craven, Cumberland and 29 more	93 min
May 31, 6:37 PM EDT	Mesoscale Discussion	SPC	Bertie, Camden, Chowan, Currituck, Gates, Halifax and 6 more	83 min

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.