Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 437

April 4, 20075 states

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2007, 2:07 AM CDT for 5 states. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Apr 4, 2007, 2:07 AM CDT (07:07 UTC)
Expired: Apr 4, 2007, 4:00 AM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 75 counties

Autauga County, AL, Bibb County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Greene County, AL, Hale County, AL, Lee County, AL, Marengo County, AL, Perry County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Ashley County, AR, Barrow County, GA, Butts County, GA, Carroll County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Fulton County, GA, Gwinnett County, GA, Haralson County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Meriwether County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Paulding County, GA, Pike County, GA, Rockdale County, GA, Spalding County, GA, Troup County, GA, Walton County, GA, East Carroll Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Union Parish, LA, West Carroll Parish, LA, Attala County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Warren County, MS, Winston County, MS, Yazoo County, MS

The radar

The Columbus AFB radar (KGWX), 118 km from the middle of the area, began a volume at 07:07 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

Jackson, MS (KJAN), launched 00:00Z, 7.1 hours before the alert went out and 125 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: 1808 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1112 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.7

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
Apr 3, 8:03 PM CDT	Tornado Watch	SPC	Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more	5 hr
Apr 3, 9:53 PM CDT	Severe Thunderstorm Watch	SPC	Blount, Calhoun, Cherokee, Clay, Cleburne, Etowah and 12 more	5 hr
Apr 3, 10:49 PM CDT	Mesoscale Discussion	SPC	Cullman, DeKalb, Jackson, Lawrence, Madison, Marshall and 1 more	56 min
Apr 3, 7:41 PM CDT	Mesoscale Discussion	SPC	Clark, Hempstead, Hot Spring, Howard, Little River, Pike and 1 more	2 hr
Apr 3, 9:14 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 18 more	61 min
Apr 3, 8:43 PM CDT	Severe Thunderstorm Watch	SPC	Rabun	5 hr
Apr 3, 11:21 PM CDT	Severe Thunderstorm Watch	SPC	Banks, Barrow, Bartow, Carroll, Chattooga, Cherokee and 27 more	3 hr

Nearby

Mesoscale Discussions in Georgia, 2007 Mesoscale Discussions in Alabama, 2007 Mesoscale Discussions in Mississippi, 2007 Every mesoscale discussion in 2007

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.