Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 422

March 15, 2008Cleburne County, Alabama; 17 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 15, 2008, 2:08 PM CDT for Cleburne County, Alabama; 17 counties in Georgia. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Mar 15, 2008, 2:08 PM CDT (19:08 UTC)
Expired: Mar 15, 2008, 3:15 PM CDT
In force: 67 min
Issued by: the Storm Prediction Center

Counties Cleburne County, AL, Barrow County, GA, Carroll County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, DeKalb County, GA, Douglas County, GA, Fulton County, GA, Gwinnett County, GA, Haralson County, GA, Jackson County, GA, Madison County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Rockdale County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 74 km from the middle of the area, began a volume at 19:11 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 120Mar 15, 3:35 PM CDT

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.1 hours before the alert went out and 69 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: 33 J/kg
Mixed-layer CIN: -342 J/kg
Mixed-layer LCL: 1103 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 459 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
Mar 14, 7:11 PM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Blount, Bullock, Calhoun, Chambers and 18 more	64 min
Mar 15, 12:39 AM CDT	Mesoscale Discussion	SPC	Blount, Calhoun, Cherokee, Clay, Cleburne, Colbert and 22 more	66 min
Mar 15, 12:56 AM CDT	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 38 more	6 hr
Mar 15, 2:57 AM CDT	Mesoscale Discussion	SPC	Cherokee, Cleburne, Randolph	93 min
Mar 15, 4:30 AM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Marion	90 min
Mar 15, 6:58 AM CDT	Mesoscale Discussion	SPC	Blount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 11 more	62 min
Mar 15, 7:02 AM CDT	Severe Thunderstorm Watch	SPC	Blount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 16 more	4 hr
Mar 15, 9:38 AM CDT	Mesoscale Discussion	SPC	Calhoun, Cherokee, Cleburne, DeKalb, Etowah, Randolph and 1 more	67 min
Mar 15, 10:02 AM CDT	Tornado Watch	SPC	Autauga, Bullock, Calhoun, Chambers, Cherokee, Chilton and 15 more	8 hr
Mar 15, 10:23 AM CDT	Mesoscale Discussion	SPC	Colbert	67 min
Mar 15, 12:22 PM CDT	Mesoscale Discussion	SPC	Bullock, Calhoun, Chambers, Clay, Cleburne, Coosa and 8 more	83 min
Mar 15, 1:21 PM CDT	Mesoscale Discussion	SPC	Calhoun, Chambers, Clay, Cleburne, Randolph	84 min
Mar 15, 2:39 PM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Cullman, DeKalb, Fayette, Franklin and 12 more	2 hr
Mar 14, 10:03 PM CDT	Mesoscale Discussion	SPC	Baldwin, Butts, Clayton, Cobb, DeKalb, Douglas and 26 more	57 min
Mar 15, 3:28 AM CDT	Severe Thunderstorm Watch	SPC	Banks, Barrow, Bartow, Butts, Carroll, Chattooga and 42 more	3 hr
Mar 15, 6:18 AM CDT	Mesoscale Discussion	SPC	Burke, Columbia, Glascock, Hancock, Jefferson, Jenkins and 7 more	117 min
Mar 15, 3:36 PM CDT	Tornado Watch PDS	SPC	Baldwin, Barrow, Bibb, Bleckley, Bryan, Bulloch and 73 more	8 hr
Mar 15, 4:56 PM CDT	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Ben Hill, Berrien, Bleckley and 40 more	64 min
Mar 15, 5:17 PM CDT	Mesoscale Discussion	SPC	Banks, Bartow, Cherokee, Cobb, Dawson, Floyd and 14 more	28 min
Mar 15, 6:41 PM CDT	Mesoscale Discussion	SPC	Baldwin, Bibb, Bleckley, Bulloch, Burke, Butts and 52 more	64 min

Nearby

Mesoscale Discussions in Georgia, 2008 Mesoscale Discussions in Alabama, 2008 Every mesoscale discussion in 2008

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.