Alert archive / Georgia / Mesoscale Discussions in 2006

Mesoscale Discussion 564

April 19, 200633 counties in Alabama; 38 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2006, 2:31 PM CDT for 33 counties in Alabama; 38 counties in Georgia. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Apr 19, 2006, 2:31 PM CDT (19:31 UTC)
Expired
Apr 19, 2006, 4:00 PM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 71 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Blount County, AL, Bullock 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, Macon County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Walker County, AL, Winston County, AL, Bibb County, GA, Carroll County, GA, Chattahoochee County, GA, Chattooga County, GA, Clayton County, GA, Coweta County, GA, Crawford County, GA, Dooly County, GA, Douglas County, GA, Fayette County, GA, Floyd County, GA, Fulton County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Lamar County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Muscogee County, GA, Paulding County, GA, Peach County, GA, Pike County, GA, Polk County, GA, Pulaski County, GA, Quitman County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Troup County, GA, Upson County, GA, Webster County, GA

The radar

The Atlanta radar (KFFC), 83 km from the middle of the area, began a volume at 19:33 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, 7.5 hours before the alert went out and 89 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, 1:39 PM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 23 more96 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.