260 FXUS63 KGRR 200532 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 132 AM EDT Tue Oct 20 2026 .KEY MESSAGES... - Quiet Weather This Week && .DISCUSSION... Issued at 132 AM EDT Tue Oct 20 2026 - Quiet Weather This Week The dry weather pattern continues this week under upper and surface ridging. The next chance for rain is not until late in the weekend. A slowly progressive pattern sees the ridge being flattened by northern stream troughing Sunday into Monday with a cold front bringing showers while slowly pushing south through the Great Lakes. && .AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/... Issued at 132 AM EDT Tue Oct 20 2026 Some shallow ground fog could bring patchy IFR and even LIFR conditions at times before daybreak. Otherwise,light and variable winds with VFR conditions will prevail through Tuesday evening. && .MARINE... Issued at 132 AM EDT Tue Oct 20 2026 Winds and waves will remain relatively light this week. There could be areas of shallow fog at times this morning, especially in coastal areas. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...None. && $$ DISCUSSION...Ostuno AVIATION...Ostuno MARINE...Ostuno

NWS GRR Office Area Forecast Discussion