Area Forecast Discussion
Issued by NWS Wilmington, OH

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523 FXUS61 KILN 180142 AFDILN AREA FORECAST DISCUSSION National Weather Service Wilmington OH 942 PM EDT Mon Jun 17 2024 .SYNOPSIS... Hot and humid air over the region will bring another day of scattered thunderstorm activity on Tuesday afternoon. Slightly drier air will make an appearance over the region on Thursday but the hot airmass will remain entrenched through at least the end of the work week, possibly into the weekend. && .NEAR TERM /UNTIL 6 AM THIS MORNING/...
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The earlier convection has largely waned locally, with only a few spotty SHRA/TSRA still possible through the overnight hours. But most locations will be dry through daybreak. Skies will briefly clouded in a few spots by convective blowoff from convection to the W/SW, but some clear skies will also be seen from time-to-time. A very muggy and warm overnight period is on tap as temps dip to the lower 70s for most spots. There may be some patchy light fog development in river valleys and in areas that received appreciable rainfall earlier today, but widespread VSBY restrictions are not expected.
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&& .SHORT TERM /6 AM THIS MORNING THROUGH 6 PM WEDNESDAY/... Another hot and muggy day is in store for Tuesday with heat indicies peaking near 100 degrees for most locations. The area of high pressure will continue to expand westward resulting in a slightly lower chance of storms in the afternoon and early evening. Min temperatures will be a little warmer than what`s expected tonight, closer to 75 for most of the CWA. && .LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... With a large and slow moving area of high pressure centered to the east, heat continues to be the main concern during the long term. For Wednesday through Sunday, highs in the mid and upper 90s combined with dewpoints around 70 will produce peak apparent temperatures ranging from 100 to 104. Overnight lows in the 70s will only provide limited help. Based on those forecast model predictions, our office has issued a heat advisory that is in effect through Friday. Extending the heat advisory through next weekend appears strongly possible. At some point, if apparent Ts are forecast to go above 104, we will need to upgrade to an excessive heat warning. There is relief on the horizon when an upper trough and cold front bring an end to the extreme heat next Monday, with highs retreating to the mid and upper 80s. Chances for abatement from the heat due to precip appear to be low. There is a chance for a few thunderstorms on Wednesday, and again on Sunday ahead of the cold front. A better chance for measurable precip will be on Sunday night and Monday surrounding the cold frontal passage. && .AVIATION /02Z TUESDAY THROUGH SATURDAY/... A few spotty SHRA/TSRA continue to percolate about the local area and coverage should continue to wane toward/past sunset. However, it may not be an entirely dry overnight across the region, with indications for additional very spotty/ISO activity possible through daybreak, especially near KILN/KCMH/KLCK. Additional diurnally-driven activity will sprout about the region again by the afternoon, but coverage should, in general, be more ISO opposed to SCT in nature. Therefore, have opted not to include even a VC at this juncture. Light southerly winds at 5-8kts or less will be maintained through the period with some VFR Cu redevelopment/expansion by/after 15z. Some BR will be possible near river valleys and in locales that received appreciable rainfall this afternoon. As such, MVFR VSBYs will again be possible at KLUK in the several hours around daybreak. OUTLOOK...No significant weather expected. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...Heat Advisory until 8 PM EDT Friday for OHZ026-034-035-042>046- 051>056-060>065-070>074-077>082-088. KY...Heat Advisory until 8 PM EDT Friday for KYZ089>100. IN...Heat Advisory until 8 PM EDT Friday for INZ050-058-059-066- 073>075-080. && $$ SYNOPSIS...Franks NEAR TERM...KC SHORT TERM...Franks LONG TERM...Coniglio AVIATION...KC