Alert archive / South Carolina / Mesoscale Discussions in 2020

Mesoscale Discussion 89

February 6, 202012 counties in Georgia; 19 counties in North Carolina; 21 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Feb 6, 2020, 9:50 AM EST for 12 counties in Georgia; 19 counties in North Carolina; 21 counties in South Carolina. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Feb 6, 2020, 9:50 AM EST (14:50 UTC)
Expired: Feb 6, 2020, 10:45 AM EST
In force: 55 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 52 counties

Clarke County, GA, Columbia County, GA, Elbert County, GA, Greene County, GA, Hart County, GA, Lincoln County, GA, Madison County, GA, McDuffie County, GA, Oconee County, GA, Oglethorpe County, GA, Taliaferro County, GA, Wilkes County, GA, Anson County, NC, Cabarrus County, NC, Catawba County, NC, Chatham County, NC, Cleveland County, NC, Davidson County, NC, Gaston County, NC, Hoke County, NC, Lee County, NC, Lincoln County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Randolph County, NC, Richmond County, NC, Rowan County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lexington County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 73 km from the middle of the area, began a volume at 14:52 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, 2.8 hours before the alert went out and 200 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 449 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 310 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 5, 7:33 PM EST	Mesoscale Discussion	SPC	Catoosa, Dade	117 min
Feb 6, 3:02 AM EST	Mesoscale Discussion	SPC	Calhoun, Chattahoochee, Clay, Coweta, Early, Harris and 17 more	88 min
Feb 6, 4:27 AM EST	Tornado Watch	SPC	Baker, Bartow, Bibb, Butts, Calhoun, Carroll and 51 more	9 hr
Feb 6, 7:40 AM EST	Mesoscale Discussion	SPC	Carroll, Clayton, Cobb, Coweta, DeKalb, Douglas and 11 more	95 min
Feb 6, 10:12 AM EST	Tornado Watch	SPC	Baldwin, Banks, Barrow, Clarke, Columbia, Elbert and 21 more	7 hr
Feb 6, 11:00 AM EST	Mesoscale Discussion	SPC	Baker, Bibb, Butts, Calhoun, Chattahoochee, Clay and 32 more	2 hr
Feb 6, 11:45 AM EST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 57 more	90 min
Feb 6, 12:17 PM EST	Tornado Watch	SPC	Appling, Atkinson, Bacon, Baker, Baldwin, Banks and 102 more	8 hr
Feb 6, 2:32 PM EST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 71 more	58 min
Feb 6, 4:29 PM EST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 48 more	2 hr
Feb 6, 5:30 PM EST	Tornado Watch	SPC	Appling, Atkinson, Bacon, Brantley, Bryan, Camden and 14 more	7 hr
Feb 6, 11:01 AM EST	Tornado Watch	SPC	Caswell, Rockingham, Stokes, Surry, Yadkin	2 hr
Feb 6, 11:55 AM EST	Mesoscale Discussion	SPC	Bertie, Camden, Chowan, Currituck, Edgecombe, Franklin and 16 more	65 min
Feb 6, 12:41 PM EST	Tornado Watch	SPC	Beaufort, Bertie, Camden, Chowan, Cumberland, Currituck and 28 more	6 hr
Feb 6, 1:08 PM EST	Mesoscale Discussion	SPC	Anson, Chatham, Hoke, Lee, Montgomery, Moore and 3 more	97 min
Feb 6, 4:00 PM EST	Mesoscale Discussion	SPC	Bladen, Brunswick, Carteret, Columbus, Craven, Duplin and 5 more	60 min
Feb 6, 4:23 PM EST	Tornado Watch	SPC	Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 15 more	9 hr

Nearby

Mesoscale Discussions in South Carolina, 2020 Mesoscale Discussions in North Carolina, 2020 Mesoscale Discussions in Georgia, 2020 Every mesoscale discussion in 2020

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.