Alert archive / South Carolina / Mesoscale Discussions in 2007

Mesoscale Discussion 247

March 1, 2007Union County, North Carolina; 24 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Mar 1, 2007, 7:59 PM EST for Union County, North Carolina; 24 counties in South Carolina. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Mar 1, 2007, 7:59 PM EST (00:59 UTC)
Expired
Mar 1, 2007, 9:30 PM EST
In force
91 min
Issued by
the Storm Prediction Center
All 25 counties

Union County, NC, Aiken County, SC, Bamberg County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, York County, SC

The radar

The Columbia radar (KCAE), 36 km from the middle of the area, began a volume at 00:59 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

Charleston AFB, SC (KCHS), launched 00:00Z, 1.0 hours before the alert went out and 177 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, Charleston AFB, SC at 00:00Z on 2007-03-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 00:00Z on 2007-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 174 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
16 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
488 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
174 m²/s²
0-3 km storm-relative helicity
402 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.

IssuedProductOfficeCountiesLasted
Mar 1, 8:27 PM ESTTornado WatchSPCAlexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more9 hr
Mar 1, 11:44 PM ESTMesoscale DiscussionSPCAlamance, Beaufort, Bertie, Bladen, Brunswick, Caswell and 40 more91 min
Mar 2, 12:28 AM ESTTornado WatchSPCAlamance, Anson, Bladen, Brunswick, Chatham, Columbus and 31 more8 hr
Mar 2, 1:45 AM ESTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 19 more90 min
Mar 2, 2:45 AM ESTTornado WatchSPCBeaufort, Carteret, Craven, Dare, Duplin, Greene and 10 more7 hr
Mar 2, 3:37 AM ESTMesoscale DiscussionSPCBertie, Camden, Caswell, Chowan, Currituck, Durham and 16 more83 min
Mar 2, 4:13 AM ESTMesoscale DiscussionSPCAnson, Bladen, Brunswick, Cabarrus, Chatham, Columbus and 26 more62 min
Mar 2, 5:10 AM ESTTornado WatchSPCBertie, Camden, Chowan, Currituck, Gates, Hertford and 3 more6 hr
Mar 2, 8:25 AM ESTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 23 more95 min
Mar 1, 8:40 PM ESTTornado WatchSPCMcCormick8 hr
Mar 1, 10:11 PM ESTMesoscale DiscussionSPCAllendale, Bamberg, Barnwell, Beaufort, Berkeley, Charleston and 5 more94 min
Mar 2, 12:54 AM ESTTornado WatchSPCAllendale, Beaufort, Berkeley, Charleston, Colleton, Dorchester and 2 more7 hr
Mar 2, 3:00 AM ESTMesoscale DiscussionSPCAiken, Calhoun, Clarendon, Fairfield, Kershaw, Lancaster and 5 more90 min
Mar 2, 6:21 AM ESTMesoscale DiscussionSPCBeaufort, Berkeley, Charleston84 min

Nearby

Mesoscale Discussions in South Carolina, 2007Mesoscale Discussions in North Carolina, 2007Every mesoscale discussion in 2007

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.