Alert archive / South Carolina / Mesoscale Discussions in 2006

Mesoscale Discussion 614

April 22, 200615 counties in North Carolina; 18 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2006, 8:28 AM EDT for 15 counties in North Carolina; 18 counties in South Carolina. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Apr 22, 2006, 8:28 AM EDT (12:28 UTC)
Expired
Apr 22, 2006, 10:00 AM EDT
In force
92 min
Issued by
the Storm Prediction Center
All 33 counties

Anson County, NC, Bladen County, NC, Chatham County, NC, Columbus County, NC, Cumberland County, NC, Harnett County, NC, Hoke County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Union County, NC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington 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), 106 km from the middle of the area, began a volume at 12:30 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

Charleston AFB, SC (KCHS), launched 12:00Z, 0.5 hours before the alert went out and 155 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 2006-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2168 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 2006-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 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
2168 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
556 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.4

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
Apr 22, 6:35 AM EDTMesoscale DiscussionSPCAlamance, Anson, Caswell, Chatham, Durham, Franklin and 17 more115 min
Apr 22, 10:29 AM EDTSevere Thunderstorm WatchSPCAnson, Beaufort, Bertie, Bladen, Brunswick, Camden and 43 more8 hr
Apr 22, 1:07 PM EDTMesoscale DiscussionSPCAlamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 52 more83 min
Apr 22, 5:58 PM EDTMesoscale DiscussionSPCBladen, Brunswick, Chatham, Columbus, Craven, Cumberland and 24 more2 hr

Nearby

Mesoscale Discussions in South Carolina, 2006Mesoscale Discussions in North Carolina, 2006Every mesoscale discussion in 2006

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.