Area Forecast Discussion
Issued by NWS Wilmington, OH

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000 FXUS61 KILN 260538 AFDILN Area Forecast Discussion National Weather Service Wilmington OH 138 AM EDT Tue Sep 26 2017 .SYNOPSIS... An upper level ridge will remain over the region through mid week. This will bring dry and warm weather conditions to the region. Much cooler air will settle into the region by the end of the week. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... Thicker band of high clouds across the region will translate north through the evening with skies becoming clear for the latter half of the night. With light and variable winds and an increase in dew points, there could be some fog in places. Forecast lows look reasonable at this point. && .SHORT TERM /6 AM THIS MORNING THROUGH 6 PM WEDNESDAY/... The ridge will continue to hold across the region on Tuesday. Since the area is on the backside of the ridge, the low level moisture will be on the increase, so there should be an increase in cu for Tuesday. Highs will be around 90 again as subsidence ahead of Maria continues. Cold front will be pushing up the Ohio Valley Tuesday night, but the night should be dry. Lows will be in the lower to mid 60s. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... A cold front will move through on Wednesday. Moisture is limited with this feature therefore only have a slight chance of showers across northwestern portions of the forecast area. Cannot rule out an isolated thunderstorm, however instability is limited therefore kept thunder mention out of the forecast. Any precipitation will taper off by Wednesday evening. The more pronounced feature with this front will be the drop off in temperatures. High temperatures on Wednesday will be in the 80s and highs on Thursday will be in the upper 60s to middle 70s. Dry conditions will be in place for Thursday, however with cold air advection have clouds increasing during the daytime hours with cu development. Dry conditions will continue for Thursday. Reinforcing cool air will move in for Saturday due to an upper trough moving through Friday into Saturday. The coolest night is expected to be Saturday night with lows in the 40s across most areas. A few spots north of Columbus may drop into the upper 30s by early Sunday morning. Temperatures will begin to warm slightly for Sunday and Monday. The ECMWF begins to move precipitation into the area for Monday, however went with a dry forecast at this time until there is more model continuity. && .AVIATION /06Z TUESDAY THROUGH SATURDAY/... High level cloudiness is finally lifting off to the northeast so expect mainly clear skies through the remainder of the morning. With light flow, this should allow for some MVFR to local IFR fog development through daybreak, especially in the the more favorable valley locations. Fog will dissipate through mid morning leaving mainly clear/VFR conditions through the remainder of the period. OUTLOOK...No significant weather expected. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && $$ SYNOPSIS...Haines/Sites NEAR TERM... SHORT TERM...Sites LONG TERM... AVIATION...JGL

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