Alert archive / Georgia / Mesoscale Discussions in 2006

Mesoscale Discussion 562

April 19, 200629 counties in Alabama; 41 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2006, 1:39 PM CDT for 29 counties in Alabama; 41 counties in Georgia. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Apr 19, 2006, 1:39 PM CDT (18:39 UTC)
Expired
Apr 19, 2006, 3:15 PM CDT
In force
96 min
Issued by
the Storm Prediction Center
All 70 counties

Bibb County, AL, Blount County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Cullman County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Jackson County, AL, Jefferson County, AL, Lawrence County, AL, Lee County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Baldwin County, GA, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gordon County, GA, Gwinnett County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Putnam County, GA, Rockdale County, GA, Spalding County, GA, Talbot County, GA, Troup County, GA, Upson County, GA, Walker County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 115 km from the middle of the area, began a volume at 18:43 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.7 hours before the alert went out and 120 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 2006-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 373 joules per kilogram.LCLLFCEL10008507005003002001001 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 2006-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.19395878Sfc1 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
373 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
584 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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 19, 9:59 AM CDTSevere Thunderstorm WatchSPCCalhoun, Chambers, Cherokee, Clay, Cleburne, DeKalb and 8 more6 hr
Apr 19, 2:31 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 27 more89 min
Apr 19, 2:54 PM CDTTornado WatchSPCBarbour, Blount, Bullock, Calhoun, Chambers, Cherokee and 19 more6 hr
Apr 19, 3:40 PM CDTMesoscale DiscussionSPCBarbour, Bullock, Henry2 hr
Apr 19, 4:50 PM CDTMesoscale DiscussionSPCBibb, Fayette, Greene, Hale, Lamar, Marengo and 4 more85 min
Apr 19, 5:34 PM CDTSevere Thunderstorm WatchSPCCoffee, Dale, Geneva, Henry, Houston4 hr
Apr 19, 5:48 PM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Chilton, Dallas, Fayette, Greene and 12 more6 hr
Apr 19, 7:58 AM CDTMesoscale DiscussionSPCBartow, Catoosa, Cherokee, Cobb, Dawson, Fannin and 7 more2 hr
Apr 19, 11:56 AM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baldwin, Ben Hill, Berrien and 64 more2 hr

Nearby

Mesoscale Discussions in Georgia, 2006Mesoscale Discussions in Alabama, 2006Every mesoscale discussion in 2006

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.