026 FXUS62 KFFC 241045 AFDFFC Area Forecast Discussion National Weather Service Peachtree City GA 645 AM EDT Mon Jun 24 2024 ...New 12Z Aviation Discussion... .SHORT TERM... (Today through Tuesday) Issued at 345 AM EDT Mon Jun 24 2024 At a glance: - Unseasonable heat remains - Dry air continues to hamper more widespread rain chances Showers and embedded thunderstorms associated with our southeastward-advancing cold front reinvigorated upon reaching a pocket of meager instability across central Georgia, this despite interacting with a stout dry layer depicted well above 700mb on yesterday evening's 24/00Z sounding. Not expecting any storms to reach severe criteria, but will be capable of lowering visibility and creating wet roads for the morning commute. Low- end (15-30%) rain chances will continue to filter southeastward through the afternoon today as lift along the leading edge of the front kicks up an isolated updraft, but expect dry air to win out on the larger scale. All of this to say, the front and its associated scant rain chances are unlikely to bring broader scale relief from our multi-day heat event. Highs this afternoon look to be just a tick lower than yesterday, but are still forecast to max out in the mid-to-upper 90s. Moving into Tuesday, frontal progression looks to stall out across the Florida panhandle, and with even drier air overspreading north and central Georgia on its heels, expect any chances for afternoon thunderstorms to be focused to the south and east of Macon -- in closest proximity to residual frontal forcing. Aloft, a relative lull in our presiding wave pattern -- with exiting troughing resulting in weakly northwesterly flow at the mid-levels -- which will serve to reinforce mostly dry conditions. Unhampered warming under mostly sunny skies will allow temperatures to rebound into the upper-90s areawide (apart from northeast Georgia, relegated to the mid-80s to near 90). What continues to be our saving grace will be strong mixing and climatologically-low afternoon dewpoints (in the upper-50s to lower-60s; between the 10th and 25th percentile per SPC's Sounding Climatology). As a result, peak afternoon heat index values will continue to be within a degree or two of actual temperatures, and perhaps even slightly "cooler" than actual highs on Tuesday. 96 && .LONG TERM... (Tuesday night through Sunday) Issued at 345 AM EDT Mon Jun 24 2024 With a 500 mb ridge over much of the eastern CONUS and a weak surface high centered to the north of Georgia, conditions will be relatively dry to begin the long term period on Tuesday evening. Temperatures will still be in the upper 80s to low 90s by 8-9 PM, and will be slow to cool through the night, dropping below 80 degrees after midnight. By early Wednesday morning, a longwave trough is expected to extend into the Mississippi River Valley and move eastward towards Georgia over the course of the day. As low level flow gains a southerly component ahead of the trough, some moisture return will be possible, first in central Georgia, then spreading northward. At the same time, Wednesday is shaping up to be another scorcher, with high temperatures mainly in the upper 90s to around 100. With increasing dewpoints in portions of east-central Georgia, heat indices could reach to between 101-105 in this area, with only slightly lower heat indices to the north and west. Latest mid-range guidance is coming into better agreement on the timing at which the aforementioned trough and an associated surface frontal boundary will advance towards the area. Scattered showers and thunderstorms ahead of the front are anticipated to spread into north Georgia by late Wednesday, while scattered diurnally-driven thunderstorms will meanwhile likely be ongoing in central Georgia. Precip chances will spread southeastward overnight and into Thursday as the weakening frontal boundary sinks southward through the forecast area. The front is then anticipated to clear the forecast area to the southeast by late Thursday night. Southerly low-level flow will likely return to the area Friday into Saturday, which will promote increasing dewpoints, hot temperatures, and afternoon thunderstorms through the weekend. It will be important to keep an eye on temperatures through the later parts of the week into the weekend. Even with trending high temperatures down slightly to account for convective development, highs are still forecast to range from between 4-8 degrees above average for late June. Highs are mainly forecast to be in the mid to upper 90s from Thursday through the end of the period, and heat indices are forecast to creep up into the triple digits in many locations, particularly in the southern half of the forecast area. King && .AVIATION... (12Z TAFS) Issued at 636 AM EDT Mon Jun 24 2024 Primarily VFR conditions to continue. Patchy line of -TSRA will continue southeastward past northern terminals. FEW-SCT MVFR cigs in the wake of convection will gradually lift to 3-5kft by 14-15Z, then will gradually clear to FEW250/SKC through the afternoon. Winds will be out of the WNW/NW, increasing to 9-12kts with low- end gusts to 15-20kts psbl through the afternoon. Expect a shift to the E side after 06-07Z Tuesday. //ATL Confidence...12Z Update... High confidence all elements. 96 && .PRELIMINARY POINT TEMPS/POPS... Athens 69 96 70 97 / 0 10 10 20 Atlanta 72 98 74 98 / 0 0 0 20 Blairsville 61 90 66 90 / 0 0 0 30 Cartersville 65 96 70 97 / 0 0 0 30 Columbus 73 101 74 100 / 0 10 10 30 Gainesville 69 94 72 95 / 0 0 0 20 Macon 71 100 72 100 / 0 10 10 30 Rome 67 98 71 97 / 0 0 0 30 Peachtree City 69 98 71 98 / 0 0 0 20 Vidalia 74 100 75 99 / 10 30 10 50 && .FFC WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...96 LONG TERM....King AVIATION...96