Alert archive / Georgia / Mesoscale Discussions in 2014

Mesoscale Discussion 1579

August 19, 20147 counties in Alabama; 35 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Aug 19, 2014, 11:43 AM CDT for 7 counties in Alabama; 35 counties in Georgia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Aug 19, 2014, 11:43 AM CDT (16:43 UTC)
Expired: Aug 19, 2014, 2:15 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 42 counties

Barbour County, AL, Coffee County, AL, Crenshaw County, AL, Dale County, AL, Henry County, AL, Houston County, AL, Pike County, AL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Bryan County, GA, Calhoun County, GA, Chatham County, GA, Clay County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Dougherty County, GA, Early County, GA, Evans County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Lee County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Pierce County, GA, Quitman County, GA, Randolph County, GA, Terrell County, GA, Tift County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Worth County, GA

The radar

The Moody AFB radar (KVAX), 84 km from the middle of the area, began a volume at 16:45 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 4.7 hours before the alert went out and 164 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: 1065 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 886 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in Georgia, 2014 Mesoscale Discussions in Alabama, 2014 Every mesoscale discussion in 2014

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.