FXUS63 KIWX 272322 AFDIWX Area Forecast Discussion National Weather Service Northern Indiana 722 PM EDT Mon Oct 27 2025 .KEY MESSAGES... - Seasonably cool temperatures will persist over the next 7 days. - A period of light rain possible Wednesday night into Thursday, best chances south of US 24 (40-60%). - Scattered lake enhanced rain showers possible at times Friday into this weekend. && .DISCUSSION... Issued at 241 PM EDT Mon Oct 27 2025 Dry and seasonably cool low level easterly flow will persist through Wednesday under an impressive high latitude blocking ridge over southeast Canada and the northern Great Lakes. This rex block forces an incoming pacific jet and developing upper low southeast into the western OH/TN Valleys by Wednesday, while a piece of a Northeast US upper low retrogrades west on its northern fringe. 12z ensemble and deterministic model guidance held pretty close overall to the last several runs increasing forecast confidence in a blossoming deformation/fgen rain band mainly passing southwest and then south of the area Tuesday night through Wednesday night. The outlier ensemble solutions are for lighter rain to possibly get into southern portions of our CWA during this time with slight chance PoPs retained here. The organizing sfc reflection after the phasing into one upper low does eventually make its northward turn near the spine of the Appalachians into Thursday and Thursday night with widespread deformation rain on the backside possibly clipping areas south of US 24 (best chances near Lima OH). Still some wiggle room at this range for adjustments in the track and intensity. Remaining cool with periodic chances for scattered lake enhanced showers otherwise into Friday and the upcoming weekend with unsettled cyclonic northwest flow locked in behind the mid-late week system. && .AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/... Issued at 720 PM EDT Mon Oct 27 2025 VFR Conditions at the TAF sites with varying high cloud coverage through the period. Otherwise, light to moderate easterly flow persists (strongest this evening and again Tuesday afternoon) at both terminals, shifting slightly more ESE at KFWA through Tuesday evening. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...None. OH...None. MI...None. MARINE...None. && $$ DISCUSSION...Steinwedel AVIATION...MCD