Alert archive / Georgia / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 71

April 12, 200422 counties in Alabama; 64 counties in Georgia

The Storm Prediction Center issued this severe thunderstorm watch at Apr 12, 2004, 2:10 PM CDT for 22 counties in Alabama; 64 counties in Georgia. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 12, 2004, 2:10 PM CDT (19:10 UTC)
Expired
Apr 12, 2004, 7:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 86 counties

Barbour County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Tallapoosa County, AL, Baker County, GA, Banks County, GA, Barrow County, GA, Bartow County, GA, Bibb County, GA, Butts County, GA, Calhoun County, GA, Carroll County, GA, Chattahoochee County, GA, Cherokee County, GA, Clarke County, GA, Clay County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Crawford County, GA, DeKalb County, GA, Dougherty County, GA, Douglas County, GA, Early County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Lee County, GA, Macon County, GA, Madison County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Paulding County, GA, Peach County, GA, Pike County, GA, Polk County, GA, Quitman County, GA, Randolph County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Troup County, GA, Upson County, GA, Walton County, GA, Webster County, GA

Warnings issued inside it

3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 12, 6:00 PM CDTSevere Thunderstorm WarningFFCChattahoochee, Muscogee30 min
Apr 12, 6:12 PM CDTSevere Thunderstorm WarningFFCHarris33 min
Apr 12, 6:17 PM CDTSevere Thunderstorm WarningBMXMacon28 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.2 hours before the alert went out and 135 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 2004-04-12Temperature 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 2004-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 square meters per square second.1939587897117Sfc1 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
629 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
278 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 1:33 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Chambers, Chilton and 18 more117 min
Apr 12, 6:31 PM CDTMesoscale DiscussionSPCBarbour, Bullock, Butler, Chambers, Clay, Coffee and 15 more59 min
Apr 12, 6:50 PM CDTSevere Thunderstorm WatchSPCBarbour, Bullock, Chambers, Clay, Coffee, Crenshaw and 12 more5 hr
Apr 12, 1:18 AM CDTMesoscale DiscussionSPCChatham, Effingham, Screven87 min
Apr 12, 12:52 PM CDTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Effingham and 7 more113 min
Apr 12, 1:25 PM CDTTornado WatchSPCBaldwin, Bleckley, Burke, Columbia, Emanuel, Glascock and 19 more6 hr
Apr 12, 3:44 PM CDTMesoscale DiscussionSPCBaldwin, Bleckley, Burke, Columbia, Dodge, Emanuel and 19 more91 min

Nearby

Severe Thunderstorm Watches in Georgia, 2004Severe Thunderstorm Watches in Alabama, 2004Every severe thunderstorm watch in 2004

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.