Area Forecast Discussion
Issued by NWS Atlanta, GA

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000 FXUS62 KFFC 292340 AFDFFC Area Forecast Discussion National Weather Service Peachtree City GA 740 PM EDT Thu Sep 29 2016 .UPDATE... For 00z TAFs/Aviation. Clouds across the norther tier a bit more persistent this evenings as the upper low anchored to the north shifts slightly southward. Feel SCT clouds may make it to the metro this evening, but should dissipate with drier air working in. Clear and calm for much of the area, with clouds still hanging around NE GA. This may hinger temperatures from radiating out overnight, but we will monitor trends. && .PREV DISCUSSION... /Issued 351 PM EDT Thu Sep 29 2016/ SHORT TERM /Tonight through Friday Night/... Very little if any impact weather across north/central Georgia through Friday night. Latest Water Vapor satellite imagery showing broad upper level low over western Kentucky, drifting south. This feature has been the main player in bringing much-welcomed cooler and drier air across north and central Georgia today. The seasonally cool and dry conditions will persist over the next couple days even as this upper low begins to retrograde back to the north. Expect overnight temps to dip into the 40s and 50s for many locations beneath mainly clear skies. Winds should decouple most areas by sunset this evening. Friday will be very similar to today, if not a few degrees cooler in spots - especially extreme southern counties (Americus to Dublin/Vidalia areas) where the cooler air had yet to reach so far today. DJN.83 LONG TERM /Saturday through Thursday/... Medium range models remain in fairly good agreement through most of the extended forecast period and have not deviated significantly from recent runs. There is some divergence between the GFS and ECMWF late in the period, but not beyond what would be expected that far into the future. All-in-all I made minimal changes to the extended forecast grids. Please see the previous extended forecast discussion below. 20 LONG TERM /Friday Night through Wednesday/... The extended portion of the forecast remains quiet. High pressure at the surface will dominate for much of the extended forecast. The surface ridging begins to weaken by the end of next week as a cold front begins to approach the Mississippi River. Aloft, a long wave trough will dominate across the eastern US through early next week. By the middle of the week, ridging begins to build across the area. So, will all of this said, a dry and seasonable forecast will hold. One thing to keep an eye on though, is the progression of TS Matthew. For now, both the GFS and ECMWF keep the storm well to the east of the CWFA. NListemaa .AVIATION... 00Z Update... VFR conditions through the TAF period with very pleasant flying conditions expected. A deep upper low anchored in the Ohio River Valley has ushered some cloud cover across the northern tier of GA. Some of these clouds could drift south toward the metro TAF sites. Thus have introduced a SCT 6KFT deck through the evening hours. Anticipate lowering CIGS across the higher elevations, but not impacting any TAF sites. Should be clear and fairly calm conditions elsewhere tonight. NW flow continues through tomorrow. With very little moisture within the atmospheric column, feel clouds will be limited. However, can not rule out some diurnally driven CU around 5KFT. //ATL Confidence...00Z Update... Confidence is High on all elements. 26 && .PRELIMINARY POINT TEMPS/POPS... Athens 53 77 52 83 / 0 0 0 0 Atlanta 53 75 56 81 / 0 0 0 0 Blairsville 45 71 47 76 / 5 5 5 5 Cartersville 49 75 51 80 / 0 0 0 5 Columbus 56 80 56 85 / 0 0 0 0 Gainesville 53 74 54 79 / 0 0 0 5 Macon 54 81 52 85 / 0 0 0 0 Rome 49 75 50 80 / 5 5 0 5 Peachtree City 51 76 50 81 / 0 0 0 0 Vidalia 61 83 59 86 / 5 0 0 0 && .FFC WATCHES/WARNINGS/ADVISORIES... NONE. && $$ SHORT TERM...DJN.83 LONG TERM....20 AVIATION...26

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