Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 765

May 5, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 5, 2003, 12:52 PM CDT for 4 states. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
May 5, 2003, 12:52 PM CDT (17:52 UTC)
Expired
May 5, 2003, 2:45 PM CDT
In force
113 min
Issued by
the Storm Prediction Center
All 60 counties

Bibb County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Perry County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, Douglas County, GA, Fannin 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, Troup County, GA, Union County, GA, Walker County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Swain County, NC, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Hamilton County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN, Sequatchie County, TN

The radar

The Atlanta radar (KFFC), 119 km from the middle of the area, began a volume at 17:51 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, 5.9 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 2003-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1048 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 2003-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 299 square meters per square second.1939587897Sfc1 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
1048 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
616 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
299 m²/s²
0-3 km storm-relative helicity
345 m²/s²
Significant tornado parameter
1.7
Supercell composite
5.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

271 
ACUS11 KWNS 051753
SWOMCD
SPC MCD 051752 
NCZ000-TNZ000-GAZ000-ALZ000-051945-

MESOSCALE DISCUSSION 0765
NWS STORM PREDICTION CENTER NORMAN OK
1252 PM CDT MON MAY 05 2003

AREAS AFFECTED...AL GA TN

CONCERNING...TORNADO WATCH 250...

VALID 051752Z - 051945Z

COMPLEX OF STRONG/SEVERE THUNDERSTORMS MOVING INTO WESTERN AL
VICINITY PICKENS/TUSCALOOSA COUNTIES WITH WARM SECTOR AIRMASS TO THE
EAST BECOMING INCREASINGLY UNSTABLE WITH MUCAPES TO 3000 J/KG.	DEEP
LAYER SHEAR OF 50 KT ALONG WITH VEERING BOUNDARY LAYER PROFILES
SUPPORT FOR INCREASING THREAT OF TORNADIC SUPERCELLS AS ACTIVITY
MOVES INTO CENTRAL AL. AT THE CURRENT SPEED OF 27050 STORMS SHOULD
BE MOVING ACROSS JEFFERSON AND SHELBY COUNTIES BETWEEN 1830-1900Z. 

..HALES.. 05/05/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...GSP...MRX...FFC...OHX...BMX...HUN...

32598742 35738540 35738311 32618520

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 4:18 AM CDTMesoscale DiscussionSPCColbert, Lauderdale57 min
May 5, 4:55 AM CDTTornado WatchSPCColbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more6 hr
May 5, 6:07 AM CDTMesoscale DiscussionSPCDeKalb, Jackson, Marshall83 min
May 5, 6:15 AM CDTTornado WatchSPCDeKalb, Jackson, Marshall3 hr
May 5, 7:11 AM CDTMesoscale DiscussionSPCColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more2 hr
May 5, 8:50 AM CDTTornado WatchSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 13 more6 hr
May 5, 9:05 AM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Greene, Hale and 13 more115 min
May 5, 9:35 AM CDTTornado WatchSPCColbert, Cullman, Fayette, Franklin, Greene, Lamar and 10 more5 hr
May 5, 10:38 AM CDTMesoscale DiscussionSPCBibb, Blount, Colbert, Cullman, Fayette, Franklin and 15 more3 hr
May 5, 11:06 AM CDTMesoscale DiscussionSPCBibb, Colbert, Cullman, Fayette, Franklin, Greene and 12 more114 min
May 5, 2:13 PM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 32 more62 min
May 5, 2:35 PM CDTTornado WatchSPCBibb, Blount, Colbert, Cullman, Fayette, Franklin and 15 more7 hr
May 5, 5:40 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Chambers, Cherokee, Clay, Cleburne and 26 more2 hr
May 5, 3:15 AM CDTTornado WatchSPCCherokee, Graham6 hr
May 4, 7:34 PM CDTMesoscale DiscussionSPCBenton, Carroll, Chester, Crockett, Decatur, Dyer and 20 more116 min
May 4, 9:26 PM CDTMesoscale DiscussionSPCBenton, Carroll, Chester, Crockett, Decatur, Dyer and 19 more2 hr
May 4, 11:37 PM CDTMesoscale DiscussionSPCBedford, Cannon, Cheatham, Clay, Coffee, Davidson and 29 more23 min
May 4, 11:45 PM CDTTornado WatchSPCBedford, Cannon, Cheatham, Clay, Coffee, Davidson and 30 more5 hr
May 5, 1:20 AM CDTTornado WatchSPCBenton, Carroll, Chester, Crockett, Decatur, Dyer and 19 more6 hr
May 5, 2:31 AM CDTMesoscale DiscussionSPCAnderson, Bedford, Bledsoe, Blount, Campbell, Cannon and 42 more89 min
May 5, 11:59 AM CDTMesoscale DiscussionSPCPickett61 min
May 5, 5:18 PM CDTMesoscale DiscussionSPCDyer, Lake, Lauderdale117 min

Nearby

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