726 FXUS63 KGRR 130723 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 223 AM EST Fri Nov 13 2026 .KEY MESSAGES... - Lake effect showers into the weekend then dry and milder && .DISCUSSION... Issued at 223 AM EST Fri Nov 13 2026 - Lake effect showers into the weekend then dry and milder The Great Lakes region is between an upper low across the NE CONUS and a sharp upper ridge to the west as an omega block is in place across North America. The resulting cyclonic flow will continue through Saturday before the blocking breaks down and heights rise by Sunday. Lake effect rain and snow showers will gradually end this weekend as the ridge flattens and moves east across the region, with dry and mild conditions into mid-week. Return flow moisture and a low moving across southern Canada could being showers by the end of the week. && .AVIATION /06Z TAFS THROUGH 06Z SATURDAY/... Issued at 223 AM EST Fri Nov 13 2026 MVFR conditions at 06Z should be improving to VFR conditions by morning. North winds generally blo 10 knots through Friday night. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...Small Craft Advisory until 7 PM EST this evening for LMZ844>849. && $$ DISCUSSION...Ostuno AVIATION...Ostuno

NWS GRR Office Area Forecast Discussion