Alert archive / Georgia / Mesoscale Discussions in 2015

Mesoscale Discussion 299

April 14, 20159 counties in Alabama; 13 counties in Florida; 18 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2015, 4:47 PM CDT for 9 counties in Alabama; 13 counties in Florida; 18 counties in Georgia. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Apr 14, 2015, 4:47 PM CDT (21:47 UTC)
Expired: Apr 14, 2015, 6:15 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 40 counties

Barbour County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Pike County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA, Thomas County, GA, Worth County, GA

The radar

The Ft Rucker radar (KEOX), 60 km from the middle of the area, began a volume at 21:47 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

Birmingham, AL (KBMX), launched 12:00Z, 9.8 hours before the alert went out and 281 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: 405 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

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, 2015 Mesoscale Discussions in Florida, 2015 Mesoscale Discussions in Alabama, 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.