Area Forecast Discussion
Issued by NWS Wilmington, OH

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000 FXUS61 KILN 020548 AFDILN Area Forecast Discussion National Weather Service Wilmington OH 148 AM EDT SAT JUL 2 2016 .SYNOPSIS... High pressure will build into the Great Lakes, offering dry weather Saturday. Showers and thunderstorms will return Sunday ahead of low pressure approaching from the the west. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... Diurnal cumulus clouds have dissipated, leaving only a line of clouds across northern Kentucky into southern Ohio. These clouds should drop se while dissipating, leaving clear skies for the overnight. With high pressure and drier air building in, temperatures are expected to drop to the middle and upper 50s. && .SHORT TERM /6 AM THIS MORNING THROUGH 6 PM SUNDAY/... Northwest flow aloft with surface high pressure building southeast across the Ohio Valley Saturday. Expect a good amount of sunshine early with an increase in mainly high level clouds through the day. In CAA pattern 8H temperatures to drop to readings between 10 deg C and 12 deg C by 18Z. Highs will be around 5 degrees below normal with highs ranging from the upper 70s north to the lower 80s south. The flow backs westerly with the surface high shifting to our east Saturday night. Weak isentropic lift develops into the southwest late Saturday night ahead of s/w and associated sfc low. Will continue to increase clouds with a chance of showers/thunderstorms into the southwest toward sunrise Sunday. Lows to range from the upper 50s north to the lower 60s south. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... A warm front will be extending into the ILN area Sunday ahead of low pressure centered to the west. In a very moist airmass containing around 2.25 inches of precipitable water, and with sounding profiles showing near saturation through much of the troposphere, rain will develop in isentropic lift along the front. This will be a slow moving system, with the east-west oriented warm front nearly parallel to the mid level flow, producing a prolonged period of rain that could last through Sunday night into Monday. These factors point to heavy rainfall, with precipitation amounts perhaps around 2 inches. This scenario could lead to flooding, and will continue to mention in HWO, possibly leading up to watches and warnings as the event unfolds. With models showing little to no surface based CAPE, widespread thunderstorms are not expected. As the low weakens to the west and the front sags south of the area, widespread showers will end by Tuesday. However, mainly afternoon thunderstorms will be possible in a very warm and humid airmass that will be in place Tuesday through Friday. Temperatures will be exhibiting a warming trend. Readings may be limited to the 70s Sunday under widespread clouds and precipitation. After a slight boost to around 80 on Monday, highs will continue to increase, reaching the 90s by Thursday and Friday. && .AVIATION /06Z SATURDAY THROUGH WEDNESDAY/... High pressure and dry conditions will start out the TAF period. High clouds will move into the area overnight and mid clouds will move into the region during the day. In addition some cu will also be possible during the daytime hours. VFR clouds will continue to increase in coverage tonight as a system begins to approach the area. Held off precipitation at all area TAF sites except for the longer KCVG TAF where a VCSH was added. OUTLOOK...Thunderstorms with MVFR ceilings and vsbys possible Monday into Wednesday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && $$ SYNOPSIS...AR/Sites NEAR TERM...Sites SHORT TERM...AR LONG TERM...Coniglio AVIATION...Novak is the U.S. government's official web portal to all federal, state and local government web resources and services.