Alert archive / Georgia / Mesoscale Discussions in 2015

Mesoscale Discussion 1985

November 18, 201514 counties in Georgia; 9 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Nov 18, 2015, 11:42 PM EST for 14 counties in Georgia; 9 counties in South Carolina. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Nov 18, 2015, 11:42 PM EST (04:42 UTC)
Expired: Nov 19, 2015, 1:15 AM EST
In force: 93 min
Issued by: the Storm Prediction Center

All 23 counties

Bulloch County, GA, Burke County, GA, Candler County, GA, Columbia County, GA, Emanuel County, GA, Evans County, GA, Jenkins County, GA, Montgomery County, GA, Richmond County, GA, Screven County, GA, Tattnall County, GA, Toombs County, GA, Treutlen County, GA, Wheeler County, GA, Aiken County, SC, Barnwell County, SC, Edgefield County, SC, Greenwood County, SC, Laurens County, SC, Lexington County, SC, Newberry County, SC, Saluda County, SC, Union County, SC

The radar

The Charleston,SC radar (KCLX), 111 km from the middle of the area, began a volume at 04:45 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 00:00Z, 4.7 hours before the alert went out and 194 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: 900 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 179 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.

Issued	Product	Office	Counties	Lasted
Nov 18, 7:53 PM EST	Mesoscale Discussion	SPC	Baldwin, Bleckley, Burke, Columbia, Elbert, Emanuel and 19 more	67 min
Nov 18, 8:16 PM EST	Tornado Watch	SPC	Baldwin, Bleckley, Burke, Columbia, Dodge, Elbert and 27 more	5 hr

Nearby

Mesoscale Discussions in Georgia, 2015 Mesoscale Discussions in South Carolina, 2015 Every mesoscale discussion in 2015

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.