Alert archive / Georgia / Mesoscale Discussions in 2011

Mesoscale Discussion 1378

June 24, 201128 counties in Alabama; 29 counties in Georgia; 12 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2011, 5:20 PM CDT for 28 counties in Alabama; 29 counties in Georgia; 12 counties in Mississippi. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jun 24, 2011, 5:20 PM CDT (22:20 UTC)
Expired: Jun 24, 2011, 6:45 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center

All 69 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Coosa County, AL, Crenshaw County, AL, Dallas County, AL, Elmore County, AL, Hale County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Sumter County, AL, Tallapoosa County, AL, Wilcox County, AL, Bibb County, GA, Butts County, GA, Chattahoochee County, GA, Clayton County, GA, Coweta County, GA, Crawford County, GA, Fayette County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Muscogee County, GA, Newton County, GA, Peach County, GA, Pike County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Talbot County, GA, Taylor County, GA, Troup County, GA, Upson County, GA, Clarke County, MS, Covington County, MS, Jasper County, MS, Jones County, MS, Lauderdale County, MS, Madison County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Wayne County, MS

The radar

The Birmingham radar (KBMX), 75 km from the middle of the area, began a volume at 22:21 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, 10.3 hours before the alert went out and 76 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: 1692 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 755 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 44 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
Jun 24, 12:58 PM CDT	Mesoscale Discussion	SPC	Blount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 18 more	2 hr
Jun 24, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 30 more	7 hr
Jun 24, 3:42 PM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 29 more	93 min
Jun 24, 12:05 PM CDT	Mesoscale Discussion	SPC	Rabun	2 hr

Nearby

Mesoscale Discussions in Georgia, 2011 Mesoscale Discussions in Alabama, 2011 Mesoscale Discussions in Mississippi, 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.