007 FXUS63 KGRR 111837 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 237 PM EDT Sun Oct 11 2026 .KEY MESSAGES... - Rain Mid-Week then Cooler && .DISCUSSION... Issued at 237 PM EDT Sun Oct 11 2026 - Rain Mid-Week then Cooler Showers are moving off to the east of Lower Michigan on Sunday afternoon, but a thin deck of stratocu remains. Upper ridging with fair and warm weather continues into Monday before a shortwave trough rides over the top of the ridge with a low pressure center tracking across the central Great Lakes on Tuesday. Showers are possible in an area of warm advection Monday night into Tuesday but the steadier rain associated with an area of frontogenesis appears to move across northern Lower Michigan. Another chance for rain comes on late Tuesday and early Wednesday across the southern forecast area as a trailing cold front moves through and stalls. This is followed by another low moving along the front and bringing rain on Thursday. Cooler air moves in as an upper trough digs across the eastern CONUS by the end of the week. && .AVIATION /18Z TAFS THROUGH 18Z MONDAY/... Issued at 113 PM EDT Sun Oct 11 2026 A large area of clouds cover the terminals except MKG, where it`s clear. We`ll see the clouds decrease from northwest to southeast throughout the rest of the afternoon into the evening, leading to mostly clear skies overnight. There may be some fog toward sunrise near JXN, but will burn off by 9am. && .MARINE... Issued at 237 PM EDT Sun Oct 11 2026 Winds and waves will increase on Monday and conditions may be hazardous to small craft at times Monday night and Tuesday. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...None. && $$ DISCUSSION...Ostuno AVIATION...04 MARINE...Ostuno

NWS GRR Office Area Forecast Discussion