Alert archive / Alabama / Mesoscale Discussions in 2003

Mesoscale Discussion 691

May 2, 20035 states

The Storm Prediction Center issued this mesoscale discussion at May 2, 2003, 5:36 PM CDT for 5 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
May 2, 2003, 5:36 PM CDT (22:36 UTC)
Expired
May 2, 2003, 7:00 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 99 counties

Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Haralson County, GA, Heard County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Towns County, GA, Union County, GA, Walker County, GA, Whitfield County, GA, Alcorn County, MS, Calhoun County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Itawamba County, MS, Lee County, MS, Lowndes County, MS, Monroe County, MS, Oktibbeha County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Cherokee County, NC, Clay County, NC, Graham County, NC, Bedford County, TN, Bradley County, TN, Chester County, TN, Coffee County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Hardin County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, McMinn County, TN, McNairy County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Polk County, TN, Sequatchie County, TN, Wayne County, TN

The radar

The Northeast Alabama radar (KHTX), 93 km from the middle of the area, began a volume at 22:38 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.6 hours before the alert went out and 124 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 2003-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 134 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 2003-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
134 J/kg
Mixed-layer CIN
-350 J/kg
Mixed-layer LCL
1399 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
248 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 2, 1:43 PM CDTMesoscale DiscussionSPCBlount, Colbert, Cullman, Etowah, Fayette, Franklin and 14 more92 min
May 2, 1:55 PM CDTSevere Thunderstorm WatchSPCBlount, Calhoun, Cherokee, Clay, Cleburne, Colbert and 23 more5 hr
May 2, 3:25 PM CDTSevere Thunderstorm WatchSPCAutauga, Barbour, Bibb, Bullock, Butler, Chambers and 26 more4 hr
May 2, 4:57 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Chambers and 25 more93 min
May 2, 5:05 PM CDTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 37 more5 hr
May 2, 1:23 PM CDTMesoscale DiscussionSPCRabun2 hr
May 2, 1:35 PM CDTSevere Thunderstorm WatchSPCBanks, Franklin, Habersham, Hall, Hart, Rabun and 1 more5 hr
May 2, 3:40 PM CDTSevere Thunderstorm WatchSPCColumbia, Glascock, McDuffie, Richmond5 hr
May 2, 4:43 PM CDTMesoscale DiscussionSPCBaldwin, Barrow, Bibb, Bleckley, Butts, Chattahoochee and 36 more92 min
May 2, 5:25 PM CDTSevere Thunderstorm WatchSPCBaldwin, Barrow, Bartow, Bibb, Bleckley, Butts and 58 more6 hr
May 2, 6:17 PM CDTMesoscale DiscussionSPCColumbia, Glascock, Richmond88 min
May 2, 2:21 PM CDTMesoscale DiscussionSPCAdams, Amite, Attala, Bolivar, Carroll, Choctaw and 33 more114 min
May 2, 2:55 PM CDTSevere Thunderstorm WatchSPCAttala, Benton, Bolivar, Calhoun, Carroll, Choctaw and 21 more6 hr
May 2, 6:31 PM CDTMesoscale DiscussionSPCAttala, Benton, Bolivar, Calhoun, Carroll, Choctaw and 21 more119 min
May 2, 3:22 PM CDTMesoscale DiscussionSPCAlamance, Anson, Bladen, Cabarrus, Chatham, Cumberland and 23 more113 min
May 2, 6:45 PM CDTSevere Thunderstorm WatchSPCBeaufort, Bladen, Brunswick, Columbus, Craven, Duplin and 11 more3 hr
May 2, 8:52 AM CDTMesoscale DiscussionSPCAnderson, Bledsoe, Campbell, Cannon, Cheatham, Clay and 23 more113 min

Nearby

Mesoscale Discussions in Alabama, 2003Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in Tennessee, 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.