Alert archive / Georgia / Mesoscale Discussions in 2004

Mesoscale Discussion 2227

September 16, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Sep 16, 2004, 5:38 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 16, 2004, 5:38 PM CDT (22:38 UTC)
Expired
Sep 16, 2004, 7:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 171 counties

Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Marshall County, AL, Randolph County, AL, St. Clair County, AL, Talladega County, AL, Baldwin County, GA, Banks County, GA, Barrow County, GA, Bartow County, GA, Bibb County, GA, Bleckley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Butts County, GA, Candler County, GA, Carroll County, GA, Catoosa County, GA, Chatham County, GA, Chattahoochee County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Columbia County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Dodge County, GA, Dooly County, GA, Douglas County, GA, Effingham County, GA, Elbert County, GA, Emanuel County, GA, Evans County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Glascock County, GA, Gordon County, GA, Greene County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Hancock County, GA, Haralson County, GA, Harris County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jackson County, GA, Jasper County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lincoln County, GA, Lumpkin County, GA, Macon County, GA, Madison County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Murray County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Peach County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Pulaski County, GA, Putnam County, GA, Rabun County, GA, Richmond County, GA, Rockdale County, GA, Schley County, GA, Screven County, GA, Spalding County, GA, Stephens County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Toombs County, GA, Towns County, GA, Treutlen County, GA, Troup County, GA, Twiggs County, GA, Union County, GA, Upson County, GA, Walker County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, White County, GA, Whitfield County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Robeson County, NC, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Greenville County, SC, Greenwood County, SC, Hampton County, SC, Jasper County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Orangeburg County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC

The radar

The Atlanta radar (KFFC), 68 km from the middle of the area, began a volume at 22:41 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, 10.6 hours before the alert went out and 62 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 2004-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 417 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 2004-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 277 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
417 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
590 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
277 m²/s²
0-3 km storm-relative helicity
424 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.2

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
Sep 15, 8:09 PM CDTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Clarke, Coffee and 17 more2 hr
Sep 15, 10:35 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Chambers, Chilton and 20 more115 min
Sep 16, 1:10 AM CDTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 34 more9 hr
Sep 16, 2:57 AM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 33 more2 hr
Sep 16, 7:03 AM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 32 more117 min
Sep 16, 9:09 AM CDTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Calhoun, Chambers and 25 more66 min
Sep 16, 9:45 AM CDTTornado WatchSPCAutauga, Barbour, Bullock, Calhoun, Chambers, Cherokee and 17 more10 hr
Sep 16, 9:50 AM CDTTornado WatchSPCCoffee, Dale, Geneva, Henry, Houston, Pike10 hr
Sep 16, 1:16 PM CDTMesoscale DiscussionSPCBarbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 15 more119 min
Sep 16, 5:00 AM CDTTornado WatchSPCAtkinson, Ben Hill, Berrien, Brooks, Clinch, Coffee and 9 more5 hr
Sep 16, 9:58 AM CDTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 16 more2 hr
Sep 16, 11:20 AM CDTTornado WatchSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 19 more9 hr
Sep 16, 2:31 PM CDTMesoscale DiscussionSPCBulloch, Burke, Candler, Columbia, Effingham, Emanuel and 11 more119 min
Sep 16, 3:52 PM CDTMesoscale DiscussionSPCCherokee, Clay, Graham, Haywood, Henderson, Jackson and 3 more83 min

Nearby

Mesoscale Discussions in Georgia, 2004Mesoscale Discussions in South Carolina, 2004Mesoscale Discussions in Alabama, 2004Every mesoscale discussion 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; radar from the NEXRAD Level II archive.