Area Forecast Discussion
Issued by NWS Columbia, SC

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329 FXUS62 KCAE 202226 AFDCAE Area Forecast Discussion National Weather Service Columbia SC 626 PM EDT Fri Sep 20 2019 .SYNOPSIS... High pressure at the surface and aloft will dominate through the weekend into early next week. A weak cold front with little moisture will move through the area Monday night. && .NEAR TERM /THROUGH TONIGHT/... High pressure both aloft and at the surface will result in dry conditions through tonight due to large scale subsidence. Calm winds coupled with mostly clear skies overnight should lead to excellent radiational cooling conditions. Lowered overnight low temperatures a couple of degrees resulting in expected lows in the middle to upper 50s. && .SHORT TERM /SATURDAY THROUGH MONDAY NIGHT/... Ridging will remain across the region, both at the surface and aloft, through the early part of next week. A weak cold front will then approach the area by Monday night. Moisture will be limited this weekend, and the forecast is expected to remain dry, with pops near zero. Ahead of the front on Monday and Monday night, limited moisture once again, with any light rain they may develop along the central Appalachians diminishing as the airmass pushes east of the mountains. Kept the forecast with the front dry. Temperatures begin climbing back up above normal, with highs during the weekend in the mid to upper 80s, then by Monday temperatures will reach back into the lower 90s once again. Lows expected in the lower to middle 60s. && .LONG TERM /TUESDAY THROUGH FRIDAY/... As the front becomes diffuse and dissipates, ridging builds back into the area for the remainder of the week. Rainfall chances remain low, and dry forecast will continue for now. Temperatures will begin to climb well above normal, with the potential for near record afternoon high temperatures by the end of the period. && .AVIATION /22Z FRIDAY THROUGH WEDNESDAY/... High confidence in VFR conditions through the 24-hr period except for a few hours of fog at AGS and possibly OGB. High pressure combined with a dry airmass will provide VFR conditions through the forecast period with little in the way of cloud cover. The one potential concern is fog at AGS and possibly OGB during the predawn hours. Dewpoints have come up nearly 10 degrees from yesterday and with strong radiational cooling expected overnight think temperatures could reach the crossover temps at AGS and therefore think MVFR and brief IFR vsbys possible so will include in the forecast. Less confidence at other terminals but will include a tempo group at fog prone OGB. Otherwise, mainly clear skies throughout with light and variable to calm winds overnight becoming light from the east on Saturday around 5 knots or less. EXTENDED AVIATION OUTLOOK...Brief periods of shallow fog possible at fog prone AGS and OGB through the extended period. && .CAE WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. && $$

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