Area Forecast Discussion
Issued by NWS Wilmington, OH
Issued by NWS Wilmington, OH
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910 FXUS61 KILN 291958 AFDILN AREA FORECAST DISCUSSION National Weather Service Wilmington OH 358 PM EDT Mon Apr 29 2024 .SYNOPSIS... Showers and some thunderstorms will occur tonight into Tuesday ahead of a cold front that will cross the region. High pressure will then build in for the middle of the week with the return of much above normal temperatures. Another cold front will move towards the area on Friday bringing the next chance of showers and thunderstorms. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... Sheared short wave will lift across the area overnight. Weak cold front will be lagging and will probably still be west of I-75 by daybreak Tuesday. Atmosphere is still destabilizing, although even near term guidance is in disagreement with how much. HRRR runs have been indicating an inversion around 600 mb that is limiting CAPE while the RAP is much less pronounced with the inversion and therefore more unstable. So will continue to monitor observational trends. There is plenty of shear, so if sufficient instability materializes, it is not out of the question that there could be a few strong storms in the upper Miami Valley into west central Ohio to the east of the more solid cloud cover late this afternoon. Axis of showers with embedded thunder from northern Indiana into southern Illinois will slowly progress across the area overnight and still be in eastern counties at the end of the period. Lows will fall into the upper 50s behind the precipitation but remain in the lower 60s elsewhere. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/... Showers and possibly some thunder will still be ongoing at the beginning of the period. This will move off to the east in the morning. The cold front will continue to lag the main area of precipitation and it is possible that there could be a bit of further development along the front before it finally clears the forecast area as well. Clouds will decrease during the afternoon and into the evening. High pressure will build in behind the front and skies will eventually become clear. Highs will be in the lower to mid 70s with lows Tuesday night falling into the upper 40s to lower 50s. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... Mid-level ridging develops on Wednesday and amplifies on Thursday ahead of the next digging shortwave trough over the Central Plains. This ridging along with a return southwesterly flow will allow temperatures to return to above normal levels. A frontal system ahead of the trough will progress into the Great Lakes and Ohio Valley Friday. Showers and storms will be likely into Friday night depending on the timing of the front. Guidance continues to diverge heading into the weekend, with uncertainty on how quickly the frontal precipitation clears our area Saturday. By Sunday the first system will likely have cleared our southeast with a secondary front pushing through the Great Lakes. There may not be much moisture with this reinforcing front, so have included just a low chance of showers... which are maintained into Monday. && .AVIATION /20Z MONDAY THROUGH SATURDAY/... VFR will continue through the early part of the TAF period with south winds gusting to around 20 kt. Showers will spread across the region after 00Z. Cannot rule out some thunder, but the chance of occurrence at any one location was too low to include in the TAFs. Initially, conditions will remain VFR, but eventually ceilings and visibilities will lower to MVFR with most locations experiencing IFR ceilings sometime after 05Z. Showers will end from west to east after 09z and some improvement in ceilings will occur late in the period. OUTLOOK...MVFR ceilings may linger into Tuesday afternoon. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && $$ SYNOPSIS... NEAR TERM... SHORT TERM... LONG TERM... AVIATION...