Alert archive / North Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 1172

May 31, 200335 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at May 31, 2003, 6:12 PM EDT for 35 counties in North Carolina. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 31, 2003, 6:12 PM EDT (22:12 UTC)
Expired
May 31, 2003, 7:45 PM EDT
In force
93 min
Issued by
the Storm Prediction Center
All 35 counties

Bladen County, NC, Brunswick County, NC, Chatham County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Moore County, NC, Nash County, NC, New Hanover County, NC, Onslow County, NC, Orange County, NC, Pender County, NC, Person County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 77 km from the middle of the area, began a volume at 22:12 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

Newport, NC (KMHX), launched 12:00Z, 10.2 hours before the alert went out and 122 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-pSkew-T log-p diagram, Newport, NC at 12:00Z on 2003-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Newport, NC at 12:00Z on 2003-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
31 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1356 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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.

IssuedProductOfficeCountiesLasted
May 31, 12:50 PM EDTMesoscale DiscussionSPCAlamance, Anson, Cabarrus, Catawba, Chatham, Cleveland and 16 more115 min
May 31, 1:25 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Craven, Edgecombe and 16 more2 hr
May 31, 2:05 PM EDTTornado WatchSPCAlamance, Anson, Beaufort, Bertie, Cabarrus, Camden and 57 more6 hr
May 31, 2:41 PM EDTMesoscale DiscussionSPCColumbus, Robeson2 hr
May 31, 2:55 PM EDTTornado WatchSPCBladen, Brunswick, Columbus, New Hanover, Pender, Robeson and 1 more5 hr
May 31, 4:37 PM EDTMesoscale DiscussionSPCAlamance, Anson, Bladen, Chatham, Craven, Cumberland and 36 more113 min
May 31, 6:37 PM EDTMesoscale DiscussionSPCBertie, Camden, Chowan, Currituck, Gates, Halifax and 6 more83 min

Nearby

Mesoscale Discussions in North Carolina, 2003Every 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.