FXUS63 KIWX 250634 AFDIWX Area Forecast Discussion National Weather Service Northern Indiana 234 AM EDT Sat Oct 25 2025 .KEY MESSAGES... - Cool and dry conditions will persist through early next week. - Light rain is possible during the middle and end of next week with temperatures remaining cool. && .DISCUSSION... Issued at 234 AM EDT Sat Oct 25 2025 High-amplitude ridging between bookend upper lows across New England and the Canadian Prairies will maintain high pressure and dry conditions over the Great Lakes through early next week. A weak shortwave does pass through the area later today but anything more than a stray sprinkle is unlikely given dry/stable airmass in place and overall weak forcing. Do expect a fair amount of mid/upper level clouds around today which will keep highs in the 50s despite some moderation of low level thermal profiles. Surface anticylcone remains locked over the Lower Great Lakes supplying our area with cool/dry easterly flow through early next week. This will keep highs in the 50s to around 60F with lows each night in the mid/upper 30s. Steady wind and marginal temps should prevent widespread frost but the growing season will likely be declared over for the rest of our counties anyway given recent widespread temps at or below 32F. 00Z guidance is still struggling with the evolution of a complex mid/upper pattern featuring three distinct upper lows for the middle and end of next week. Light rain is possible Tue night into Wed and possibly beyond as these upper lows pinwheel over the eastern CONUS. However, we still remain in a zone of cool/dry low level flow with best chances west and south. Did not deviate far from NBM PoP's but additional changes are likely in the coming days. Of somewhat higher confidence is the expectation that temps remain slightly on the cool side of climo. && .AVIATION /06Z TAFS THROUGH 06Z SUNDAY/... Issued at 155 AM EDT Sat Oct 25 2025 No major changes made with the 06 TAF issuance. Fog potential overnight continues to be the primary forecast concern. Incoming low level ridge axis has resulted in light and variable/calm winds, with a few regional observations reporting some visibility restrictions in patchy shallow fog due to strong radiational cooling. This potential may manifest itself more in the way of frost development. Confidence in prolonged vsby restrictions at terminals remains quite low and will continue with VFR forecast for now. It is possible some TEMPO mention may be needed overnight into early Saturday morning however. Otherwise, some mid level WAA clouds in advance of next short wave will overspread terminals during the day. Light east-southeast winds are also expected as the low level ridge axis shifts east of northern Indiana. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...Freeze Warning until 9 AM EDT /8 AM CDT/ this morning for INZ005>009-012>015-017-018-020-022>027-032>034-103-104- 116-203-204-216. OH...Freeze Warning until 9 AM EDT this morning for OHZ001-002-004- 005-015-016-024-025. MI...None. MARINE...None. && $$ DISCUSSION...AGD AVIATION...Marsili