Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 556

April 4, 200816 counties in Alabama; 44 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2008, 3:17 PM CDT for 16 counties in Alabama; 44 counties in Georgia. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Apr 4, 2008, 3:17 PM CDT (20:17 UTC)
Expired
Apr 4, 2008, 4:45 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 60 counties

Autauga County, AL, Bibb County, AL, Calhoun County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Marengo County, AL, Perry County, AL, Randolph County, AL, Shelby County, AL, Talladega County, AL, Tallapoosa County, AL, Baldwin County, GA, Banks County, GA, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Forsyth County, GA, Fulton County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Hancock County, GA, Haralson County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Madison County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Putnam County, GA, Rockdale County, GA, Spalding County, GA, Troup County, GA, Upson County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 68 km from the middle of the area, began a volume at 20:17 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.3 hours before the alert went out and 74 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2008-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2008-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 184 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
504 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
184 m²/s²
0-3 km storm-relative helicity
245 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.

IssuedProductOfficeCountiesLasted
Apr 4, 1:28 AM CDTMesoscale DiscussionSPCColbert, Lauderdale2 hr
Apr 4, 2:46 AM CDTSevere Thunderstorm WatchSPCColbert, Franklin, Lauderdale, Lawrence, Limestone8 hr
Apr 4, 5:16 AM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Lawrence, Limestone89 min
Apr 4, 7:55 AM CDTMesoscale DiscussionSPCBlount, Colbert, Cullman, Fayette, Franklin, Greene and 16 more2 hr
Apr 4, 9:48 AM CDTTornado WatchSPCAutauga, Bibb, Blount, Chilton, Choctaw, Clarke and 18 more9 hr
Apr 4, 12:01 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Choctaw, Dallas, Greene and 5 more89 min
Apr 4, 12:33 PM CDTMesoscale DiscussionSPCChambers, Cleburne, Lee, Randolph87 min
Apr 4, 1:27 PM CDTTornado WatchSPCBarbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 14 more9 hr
Apr 4, 5:02 PM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 23 more88 min
Apr 4, 5:48 PM CDTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 11 more6 hr
Apr 4, 4:39 PM CDTMesoscale DiscussionSPCBurke, Richmond66 min
Apr 4, 5:10 PM CDTTornado WatchSPCBurke, Columbia, Lincoln, McDuffie, Richmond7 hr

Nearby

Mesoscale Discussions in Georgia, 2008Mesoscale Discussions in Alabama, 2008Every 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.