752 FXUS62 KFFC 011741 AFDFFC Area Forecast Discussion...Updated FOR Aviation National Weather Service Peachtree City GA 135 PM EDT Wed Sep 1 2021 .UPDATE... No big changes to the forecast. Have removed morning fog wording. 41 && .PREV DISCUSSION... /Issued 350 AM EDT Wed Sep 1 2021/ SHORT TERM /Today through Thursday/... The remnant low from Ida is currently positioned over eastern Tennessee, and will continue to move northeastward along the Appalachians and towards New England throughout the day today. Scattered light to moderate rain is ongoing across portions of east and central Georgia on the backside of the system. Instability from earlier today has diminished, bringing and end to the severe thunderstorm and tornado threat through the remainder of the overnight hours. Low cloud ceilings and patchy fog is also in place across north Georgia where rain has come to an end. Skies will be mostly cloudy to overcast this morning, with clouds gradually lifting and scattering out throughout the day. This cloud cover will keep high temperatures just below average and help limit instability values this afternoon. Isolated to scattered diurnally driven thunderstorms are expected across north and central Georgia this afternoon and evening, but with marginal shear and instability, a widespread threat for severe thunderstorms is not anticipated. As the remnants of Ida continue to move north and west away from the area, getting absorbed by the upper trough across the eastern CONUS and gaining extratropical characteristics, a weak cold front on the extending from the low will push southward into Georgia this afternoon and through our area during the overnight hours. The highest PoPs this afternoon and evening will be ahead of this boundary. Winds will be westerly to northwesterly throughout the day, with some gusts of 20-25 kts during the daytime, before diminishing overnight. Northwesterly flow behind the cold front and building high pressure ridging will inhibit rain chances tonight into Thursday everywhere except the far southern portion of the forecast area. Dewpoints are forecast to lower into the mid 60s and precipitable water values are forecast to decrease to 0.6-0.8 inches across much of the area, which will be a welcome change after several days of tropical moisture. Afternoon highs on Thursday will be near normal, in the mid to upper 80s across most of north and central Georgia. King LONG TERM /Thursday Night through Tuesday/... By Thursday night the entire CWA should be in the clear from any lingering moisture from the remnants of Ida. From there, a strong high pressure ridge will crest in the upper great lakes, setting up a strong NW flow pattern that will give us a break from afternoon convection for the remainder of the week and into the weekend. Temperatures will be around seasonal with highs in the upper 80s and lower 90s. Overnight lows will dip down into the low 60s making for some pleasant late summer evenings. The models have come into better agreement for early next week. The upper level flow will become zonal over the weekend with high pressure along the northern Gulf coast. A weak impulse in this zonal flow might kick of some showers and thunderstorms across far northern Georgia. The associated front eventually stalls across the Tennessee river valley indicating the potential for the return of diurnally driven convection during the start of next week. Vaughn && .AVIATION... 18Z Update... SCT/BKN035-045 across the taf sites this afternoon. Should be VFR overnight with FEW/SCT030-040 possible. An isolated shower or tstm can not be ruled out for this afternoon but pops too low to include in tafs. Winds northwest 10 to 15kts and gusty until around 23z then diminishing overnight to 10kts or less. Winds becoming northeast 8 to 10kts after 12z Thursday. //ATL Confidence...18Z Update... Medium to high confidence on all elements. 41 && .PRELIMINARY POINT TEMPS/POPS... Athens 84 65 86 63 / 20 10 5 0 Atlanta 84 66 86 65 / 20 20 5 0 Blairsville 76 58 79 57 / 50 20 5 5 Cartersville 83 63 84 63 / 20 10 5 0 Columbus 87 68 88 67 / 30 30 10 0 Gainesville 81 64 84 63 / 20 10 5 0 Macon 88 68 89 67 / 20 20 10 0 Rome 85 64 85 63 / 20 20 5 0 Peachtree City 85 65 86 65 / 20 20 5 0 Vidalia 89 71 90 69 / 20 20 20 5 && .FFC WATCHES/WARNINGS/ADVISORIES... NONE. && $$ SHORT TERM...41 LONG TERM....Vaughn AVIATION...41