Alert archive / North Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 125

February 22, 200323 counties in North Carolina; 20 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Feb 22, 2003, 9:27 AM EST for 23 counties in North Carolina; 20 counties in South Carolina. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued
Feb 22, 2003, 9:27 AM EST (14:27 UTC)
Expired
Feb 22, 2003, 10:30 AM EST
In force
63 min
Issued by
the Storm Prediction Center
All 43 counties

Alamance County, NC, Anson County, NC, Cabarrus County, NC, Chatham County, NC, Cumberland County, NC, Durham County, NC, Franklin County, NC, Granville County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Vance County, NC, Wake County, NC, Aiken County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marlboro County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, York County, SC

The radar

The Columbia radar (KCAE), 137 km from the middle of the area, began a volume at 14:30 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, 2.5 hours before the alert went out and 140 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, Greensboro/Hi Pt, NC at 12:00Z on 2003-02-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Greensboro/Hi Pt, NC at 12:00Z on 2003-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 705 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
483 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
705 m²/s²
0-3 km storm-relative helicity
845 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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
Feb 22, 9:45 AM ESTTornado WatchSPCAlamance, Anson, Bertie, Bladen, Cabarrus, Caswell and 34 more6 hr
Feb 22, 11:35 AM ESTTornado WatchSPCCherokee5 hr
Feb 22, 11:47 AM ESTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Camden, Chowan, Columbus and 33 more88 min
Feb 22, 2:22 PM ESTMesoscale DiscussionSPCBertie, Bladen, Columbus, Duplin, Edgecombe, Gates and 8 more53 min
Feb 22, 2:40 PM ESTTornado WatchSPCBeaufort, Bertie, Bladen, Camden, Carteret, Chowan and 24 more4 hr
Feb 22, 3:31 PM ESTMesoscale DiscussionSPCCherokee, Graham, Madison, Swain119 min
Feb 22, 4:31 PM ESTMesoscale DiscussionSPCBeaufort, Currituck, Jones, Pender, Washington89 min
Feb 22, 6:09 PM ESTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Camden, Carteret, Chowan and 24 more66 min
Feb 22, 6:50 AM ESTTornado WatchSPCAiken, Allendale, Bamberg, Barnwell, Calhoun, Edgefield and 4 more5 hr
Feb 22, 10:59 AM ESTMesoscale DiscussionSPCAllendale, Bamberg, Barnwell, Beaufort, Berkeley, Charleston and 8 more61 min
Feb 22, 11:55 AM ESTTornado WatchSPCAllendale, Bamberg, Beaufort, Berkeley, Calhoun, Charleston and 8 more5 hr
Feb 22, 1:49 PM ESTMesoscale DiscussionSPCBeaufort, Berkeley, Charleston, Georgetown, Williamsburg116 min

Nearby

Mesoscale Discussions in North Carolina, 2003Mesoscale Discussions in South 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.