283 FXUS63 KGRR 251810 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 210 PM EDT Fri Sep 25 2026 .KEY MESSAGES... - Dry through Tuesday, then unsettled && .DISCUSSION... Issued at 142 PM EDT Fri Sep 25 2026 - Dry through Tuesday, then unsettled Latest visible loop shows quite a bit of cloudiness moving across Lower MI in conjunction with a short wave aloft. Once the wave moves east this evening, clearing will occur from the west. The large ridge in place over the Great Lakes will get squeezed a bit from the large low over the mid Atlantic but won`t have much influence over the cwa this weekend. Instead, we`ll see quite a bit of sunshine that will carry over into mid week. Highs will warm to the lower to mid 70s by Tuesday before retreating into the 60s midweek. The ridge will break down by Tuesday as a northern stream wave moves across Canada and pushes a cold front across Lower MI. Concurrently, a southern stream wave will move east from California across the Southern Rockies. At that point, the remnants of Polo will be arriving in New Mexico and get entrained into the southern low. The end result is that that moisture will then ride northeast along the frontal boundary and toward the cwa. The GFS is a bit quicker moving the cold front through compared to the ECMWF, but both models bring rain back into the region as the southern low moves north. Thus, the latter half of next week looks unsettled with periods of showers and isolated thunder. && .AVIATION /18Z TAFS THROUGH 18Z SATURDAY/... Issued at 205 PM EDT Fri Sep 25 2026 SVR will continue to dominate the forecast through the TAF period. Clouds will remain mid to high through the day and clear overnight. No restrictions to visibility are anticipated. Winds of 5-10 knots are forecast through the TAF period. && .MARINE... Issued at 142 PM EDT Fri Sep 25 2026 Wind and waves will remain below advisory criteria through the weekend. High pressure to the northeast will generate offshore winds through Monday. Highest waves will be 1-2 feet near the 5 mile mark off shore. The high will move east Tuesday and south winds will increase, at which point a headline may be needed. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...None. && $$ DISCUSSION...04 AVIATION...Ceru MARINE...04

NWS GRR Office Area Forecast Discussion