Alert archive / Georgia / Mesoscale Discussions in 2003
Mesoscale Discussion 2178
The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2003, 1:19 PM EDT for 38 counties in Georgia; Columbus County, North Carolina; 23 counties in South Carolina. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2003, 1:19 PM EDT (17:19 UTC)
- Expired
- Aug 18, 2003, 3:15 PM EDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 62 counties
Baldwin County, GA, Barrow County, GA, Burke County, GA, Butts County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Columbia County, GA, DeKalb County, GA, Fayette County, GA, Fulton County, GA, Glascock County, GA, Greene County, GA, Gwinnett County, GA, Hancock County, GA, Henry County, GA, Jasper County, GA, Jefferson County, GA, Jones County, GA, Lamar County, GA, Lincoln County, GA, McDuffie County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Pike County, GA, Putnam County, GA, Richmond County, GA, Rockdale County, GA, Spalding County, GA, Taliaferro County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Wilkes County, GA, Columbus County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, McCormick County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Columbia radar (KCAE), 17 km from the middle of the area, began a volume at 17:19 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
Charleston AFB, SC (KCHS), launched 12:00Z, 5.3 hours before the alert went out and 140 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
- 1565 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 826 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
926 ACUS11 KWNS 181719 SWOMCD SPC MCD 181719 NCZ000-SCZ000-GAZ000-181915- MESOSCALE DISCUSSION 2178 NWS STORM PREDICTION CENTER NORMAN OK 1219 PM CDT MON AUG 18 2003 AREAS AFFECTED...SC WWD ACROSS NRN/CNTRL GA CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 181719Z - 181915Z DEVELOPING TSTMS WILL HAVE THE POTENTIAL TO PRODUCE ISOLATED DAMAGING WIND GUSTS THIS AFTERNOON. A WW IS NOT ANTICIPATED. AS OF 17Z...VISIBLE SATELLITE IMAGERY AND REGIONAL RADAR MOSAIC INDICATED TSTMS BEGINNING TO DEVELOP OVER PORTIONS OF ERN SC WWD ACROSS NRN GA. LATEST MESOANALYSIS AND DEVELOPING CU FIELD ON VISIBLE SATELLITE SUGGEST THESE STORMS ARE DEVELOPING ALONG A WEAK E-W FRONTAL BOUNDARY THAT EXTENDS FROM ERN SC /N OF CRE/ WWD TO NEAR ATL. VERY MOIST BOUNDARY-LAYER CONDITIONS /I.E. 70-75F DEWPOINTS / ALONG AND S OF THIS BOUNDARY ARE CONTRIBUTING TO A MODERATELY UNSTABLE AIRMASS EARLY THIS AFTERNOON WITH MLCAPES ALREADY APPROACHING 2000-2500 J/KG. LOW-LEVEL CONVERGENCE ALONG THIS BOUNDARY AND OUTFLOW BOUNDARY INTERACTIONS SHOULD ALLOW TSTMS TO INCREASE IN COVERAGE THROUGH THE AFTERNOON ACROSS THE MESOSCALE DISCUSSION AREA. ALTHOUGH REGIONAL VWPS INDICATE WEAK WIND SHEAR...THE DEGREE OF INSTABILITY AND AVAILABILITY OF DRY MID-LEVEL AIR /PER WATER VAPOR IMAGERY/ SUGGEST THE POTENTIAL FOR ISOLATED DAMAGING WIND GUSTS WITH THE STRONGEST CELLS. ..MEAD.. 08/18/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...ILM...CHS...CAE...GSP...FFC... 34238062 34557880 33827808 33057983 32838450 34008482
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.