Alert archive / Georgia / Mesoscale Discussions in 2011

Mesoscale Discussion 2246

October 10, 201116 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Oct 10, 2011, 12:12 PM EDT for 16 counties in Georgia. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Oct 10, 2011, 12:12 PM EDT (16:12 UTC)
Expired: Oct 10, 2011, 1:15 PM EDT
In force: 63 min
Issued by: the Storm Prediction Center

Counties Appling County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Glynn County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Tattnall County, GA, Ware County, GA, Wayne County, GA

The radar

The Jacksonville radar (KJAX), 114 km from the middle of the area, began a volume at 16:13 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

Jacksonville, FL (KJAX), launched 12:00Z, 4.2 hours before the alert went out and 113 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: 1148 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 500 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 121 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
Oct 10, 3:52 AM EDT	Mesoscale Discussion	SPC	Brantley, Camden, Charlton, Clinch, Echols, Glynn and 4 more	83 min
Oct 10, 4:26 AM EDT	Tornado Watch	SPC	Appling, Bacon, Brantley, Bryan, Camden, Charlton and 10 more	9 hr
Oct 10, 8:30 AM EDT	Mesoscale Discussion	SPC	Appling, Bacon, Brantley, Bryan, Camden, Charlton and 10 more	90 min

Nearby

Mesoscale Discussions in Georgia, 2011 Every 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.