479 FXUS63 KGRR 091126 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 626 AM EST Mon Nov 9 2026 .KEY MESSAGES... - Progressive Pattern Becomes More Amplified Late Week && .DISCUSSION... Issued at 105 AM EST Mon Nov 9 2026 - Progressive Pattern Becomes More Amplified Late Week No impact weather expected this week as a fast, quasi-zonal flow regime holds sway through mid week. Then a clipper associated with a digging northern stream shortwave trough will bring some rain and snow showers Thursday as it merges with an upper low over eastern Canada. This will lead to a more highly amplified pattern across the CONUS by next weekend, with strong northerly flow bringing lake effect rain and snow showers and cool temperatures for Friday and Saturday. && .AVIATION /12Z TAFS THROUGH 12Z TUESDAY/... Issued at 625 AM EST Mon Nov 9 2026 VFR conditions will prevail today through tonight. An area of stratus clouds with bases around 3000 feet across the northern half of the Lower Peninsula of Michigan should stay north of GRR and LAN. Winds will be west blo 10 knots today. Winds will pick up tonight near Lake Michigan and MKG will see southwest winds gust over 20 knots at times tonight. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...None. && $$ DISCUSSION...Ostuno AVIATION...Ostuno

NWS GRR Office Area Forecast Discussion