Alert archive / Georgia / Mesoscale Discussions in 2003
Mesoscale Discussion 780
The Storm Prediction Center issued this mesoscale discussion at May 6, 2003, 2:53 AM EDT for 46 counties in Georgia; 12 counties in North Carolina; 28 counties in South Carolina. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 6, 2003, 2:53 AM EDT (06:53 UTC)
- Expired
- May 6, 2003, 5:00 AM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 86 counties
Baldwin County, GA, Barrow County, GA, Butts County, GA, Carroll County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Columbia County, GA, Coweta County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Fulton County, GA, Glascock County, GA, Greene County, GA, Gwinnett County, GA, Hancock 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, Lincoln County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pike County, GA, Polk County, GA, Putnam County, GA, Richmond County, GA, Rockdale County, GA, Spalding County, GA, Taliaferro County, GA, Troup County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Wilkes County, GA, Anson County, NC, Bladen County, NC, Brunswick County, NC, Columbus County, NC, Cumberland County, NC, Duplin County, NC, Hoke County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Wayne County, NC, Abbeville County, SC, Aiken County, SC, Barnwell County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Greenwood County, SC, Horry 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, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Columbia radar (KCAE), 127 km from the middle of the area, began a volume at 06:52 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 6.9 hours before the alert went out and 194 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.
- Mixed-layer CAPE
- 1313 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 782 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 211 m²/s²
- 0-3 km storm-relative helicity
- 399 m²/s²
- Significant tornado parameter
- 3.1
- Supercell composite
- 11.6
The text
As transmitted, in the capitals the NWS used until 2016.
069 ACUS11 KWNS 060653 SWOMCD SPC MCD 060653 GAZ000-SCZ000-ALZ000-NCZ000-060900- MESOSCALE DISCUSSION 0780 NWS STORM PREDICTION CENTER NORMAN OK 0153 AM CDT TUE MAY 06 2003 AREAS AFFECTED...NRN GA...SC...SERN NC CONCERNING...TORNADO WATCH 259...261... VALID 060653Z - 060900Z SEVERE TSTM LINE INCLUDING APPARENT BOW ECHO SHOULD CONTINUE MOVING EWD ACROSS CENTRAL/ERN SC NEXT FEW HOURS...POSSIBLY TOWARD ILM-MYR AREA THROUGH 9-10Z TIME FRAME. FORMER HP SUPERCELL HAS BEEN ABSORBED BY THIS LINE...HOWEVER ADDITIONAL POTENTIAL FOR SUPERCELL DEVELOPMENT EXISTS ACROSS THIS REGION WITH VERTICAL SHEAR PROFILES SHOWING 50-55 KT IN 0-6 KM LAYER AND 150-200 J/KG 0-3 KM SRH. ROUGHLY 1500 J/KG MUCAPE EVIDENT IN MODIFIED RAOBS AND RUC SOUNDINGS. OTHERWISE...ANTICIPATE POTENTIALLY DAMAGING CONVECTIVE GUSTS ACROSS PORTIONS WW 261 AREA. TSTM WIND DAMAGE REPORTED EDGEFIELD COUNTY SC PAST HOUR. SEVERE POTENTIAL APPEARS TO BE DIMINISHING FARTHER SW INTO WW 259 WHERE OUTFLOW BOUNDARY APPEARS TO BE UNDERCUTTING CELLS RAPIDLY. INFLOW-LAYER AIR MASS REMAINS UNSTABLE WITH SFC DEW POINTS NEAR 70 F...HOWEVER...AND ANY ADDITIONAL DEVELOPMENT AHEAD OF OUTFLOW SURGE HAS POTENTIAL TO BECOME SEVERE. ..EDWARDS.. 05/06/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CAE...GSP...FFC...BMX...MHX...RAH...ILM...CHS...CAE...GSP...FFC... 32668530 34258529 34088252 32488256 32668254 34418251 35507790 33757790
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 8:53 PM EDT | Mesoscale Discussion | SPC | Bartow, Carroll, Chattooga, Cherokee, Cobb, Dade and 9 more | 2 hr |
| May 5, 9:30 PM EDT | Tornado Watch | SPC | Baldwin, Barrow, Bibb, Butts, Carroll, Clarke and 43 more | 8 hr |
| May 5, 11:27 PM EDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Butts, Carroll, Cherokee and 34 more | 2 hr |
| May 6, 1:55 AM EDT | Tornado Watch | SPC | Burke, Columbia, Jefferson, Lincoln, McDuffie, Richmond | 6 hr |
| May 6, 2:50 AM EDT | Tornado Watch | SPC | Chattooga, Dade | 6 hr |
| May 6, 6:06 AM EDT | Mesoscale Discussion | SPC | Chattooga, Dade | 3 hr |
| May 6, 6:23 AM EDT | Mesoscale Discussion | SPC | Burke, Columbia, Jefferson, McDuffie, Richmond | 2 hr |
| May 6, 8:40 AM EDT | Tornado Watch | SPC | Chattooga, Dade, Walker | 5 hr |
| May 6, 10:45 AM EDT | Severe Thunderstorm Watch | SPC | Banks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 41 more | 5 hr |
| May 6, 11:26 AM EDT | Mesoscale Discussion | SPC | Chattooga, Dade | 2 hr |
| May 6, 1:15 PM EDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Butts, Carroll, Chattooga and 50 more | 90 min |
| May 6, 1:30 PM EDT | Tornado Watch | SPC | Baldwin, Banks, Barrow, Bartow, Burke, Butts and 59 more | 7 hr |
| May 6, 2:18 PM EDT | Mesoscale Discussion | SPC | Effingham, Screven | 117 min |
| May 6, 4:41 PM EDT | Mesoscale Discussion | SPC | Baldwin, Banks, Barrow, Bartow, Bibb, Burke and 60 more | 2 hr |
| May 5, 11:05 PM EDT | Mesoscale Discussion | SPC | Aiken, Berkeley, Calhoun, Chester, Chesterfield, Clarendon and 17 more | 3 hr |
| May 6, 2:40 PM EDT | Tornado Watch | SPC | Aiken, Allendale, Bamberg, Barnwell, Berkeley, Calhoun and 20 more | 5 hr |
Nearby
Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in South Carolina, 2003Mesoscale Discussions in North Carolina, 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.