Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 791

May 6, 200324 counties in Alabama; 56 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at May 6, 2003, 12:15 PM CDT for 24 counties in Alabama; 56 counties in Georgia. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
May 6, 2003, 12:15 PM CDT (17:15 UTC)
Expired
May 6, 2003, 1:45 PM CDT
In force
90 min
Issued by
the Storm Prediction Center
All 80 counties

Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Jackson County, AL, Jefferson County, AL, Lawrence 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, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Greene County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Hancock County, GA, Haralson County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Lumpkin County, GA, Madison County, GA, Morgan County, GA, Murray County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Putnam County, GA, Rabun County, GA, Rockdale County, GA, Spalding County, GA, Stephens County, GA, Taliaferro County, GA, Towns County, GA, Union County, GA, Walker County, GA, Walton County, GA, Warren County, GA, White County, GA, Whitfield County, GA

The radar

The Birmingham radar (KBMX), 106 km from the middle of the area, began a volume at 17:18 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

Birmingham, AL (KBMX), launched 12:00Z, 5.3 hours before the alert went out and 106 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, Birmingham, AL at 12:00Z on 2003-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1558 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, Birmingham, AL at 12:00Z on 2003-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 287 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
1558 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
599 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
287 m²/s²
0-3 km storm-relative helicity
375 m²/s²
Significant tornado parameter
3.3
Supercell composite
12.2

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
May 5, 7:53 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Clay, Cleburne, Colbert and 20 more2 hr
May 5, 9:05 PM CDTTornado WatchSPCBibb, Blount, Calhoun, Chambers, Cherokee, Clay and 17 more7 hr
May 5, 10:27 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Cleburne, Cullman, DeKalb and 12 more2 hr
May 6, 1:26 AM CDTMesoscale DiscussionSPCBlount, Calhoun, Chambers, Cherokee, Clay, Cleburne and 17 more3 hr
May 6, 1:50 AM CDTTornado WatchSPCBlount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 14 more6 hr
May 6, 5:06 AM CDTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 9 more3 hr
May 6, 7:40 AM CDTTornado WatchSPCBlount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 16 more5 hr
May 6, 10:26 AM CDTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 15 more2 hr
May 6, 12:30 PM CDTTornado WatchSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 22 more7 hr
May 6, 3:41 PM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 20 more2 hr
May 6, 5:48 PM CDTMesoscale DiscussionSPCBibb, Chilton, Coosa, Greene, Hale, Jefferson and 5 more3 hr
May 5, 8:30 PM CDTTornado WatchSPCBaldwin, Barrow, Bibb, Butts, Carroll, Clarke and 43 more8 hr
May 6, 12:55 AM CDTTornado WatchSPCBurke, Columbia, Jefferson, Lincoln, McDuffie, Richmond6 hr
May 6, 1:53 AM CDTMesoscale DiscussionSPCBaldwin, Barrow, Butts, Carroll, Clarke, Clayton and 40 more2 hr
May 6, 5:23 AM CDTMesoscale DiscussionSPCBurke, Columbia, Jefferson, McDuffie, Richmond2 hr
May 6, 9:45 AM CDTSevere Thunderstorm WatchSPCBanks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 41 more5 hr
May 6, 1:18 PM CDTMesoscale DiscussionSPCEffingham, Screven117 min

Nearby

Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in Alabama, 2003Every mesoscale discussion in 2003

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.