Alert archive / North Carolina / Mesoscale Discussions in 2011

Mesoscale Discussion 2336

November 16, 2011Chatham County, Effingham County, Screven County, Georgia; 27 counties in North Carolina; 25 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Nov 16, 2011, 6:48 PM EST for Chatham County, Effingham County, Screven County, Georgia; 27 counties in North Carolina; 25 counties in South Carolina. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Nov 16, 2011, 6:48 PM EST (23:48 UTC)
Expired
Nov 16, 2011, 8:15 PM EST
In force
87 min
Issued by
the Storm Prediction Center
All 55 counties

Chatham County, GA, Effingham County, GA, Screven County, GA, Anson County, NC, Bladen County, NC, Chatham County, NC, Columbus County, NC, Cumberland County, NC, Duplin County, NC, Durham County, NC, Franklin County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Columbia radar (KCAE), 92 km from the middle of the area, began a volume at 23:47 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

Charleston AFB, SC (KCHS), launched 12:00Z, 11.8 hours before the alert went out and 160 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 12:00Z on 2011-11-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 347 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, Charleston AFB, SC at 12:00Z on 2011-11-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 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
347 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
485 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

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
Nov 16, 8:25 AM ESTMesoscale DiscussionSPCCarroll, Clayton, Coweta, Douglas, Fayette, Haralson and 7 more95 min
Nov 16, 10:46 AM ESTTornado WatchSPCBartow, Carroll, Catoosa, Chattahoochee, Chattooga, Cherokee and 38 more7 hr
Nov 16, 10:59 AM ESTMesoscale DiscussionSPCBartow, Carroll, Catoosa, Chattahoochee, Chattooga, Cherokee and 35 more91 min
Nov 16, 1:17 PM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Baldwin, Banks and 110 more118 min
Nov 16, 1:35 PM ESTTornado WatchSPCBaker, Baldwin, Banks, Barrow, Ben Hill, Berrien and 83 more7 hr
Nov 16, 4:06 PM ESTMesoscale DiscussionSPCAppling, Bacon, Bryan, Bulloch, Burke, Candler and 11 more114 min
Nov 16, 4:30 PM ESTTornado WatchSPCBryan, Bulloch, Candler, Chatham, Effingham, Evans and 6 more7 hr
Nov 16, 5:35 PM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Berrien, Brantley, Brooks and 16 more85 min
Nov 16, 4:45 PM ESTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Currituck, Dare and 11 more90 min

Nearby

Mesoscale Discussions in North Carolina, 2011Mesoscale Discussions in South Carolina, 2011Mesoscale Discussions in Georgia, 2011Every mesoscale discussion in 2011

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.