599 FXUS63 KGRR 221028 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 628 AM EDT Mon Jun 22 2026 .KEY MESSAGES... - Cooler than normal this week with Rain on Wednesday && .DISCUSSION... Issued at 221 AM EDT Mon Jun 22 2026 - Cooler than normal this week with Rain on Wednesday The Great Lakes region will continue to be in a fast quasi-zonal flow regime on the southern edge of persistent upper troughing across eastern Canada this week. This will keep temperatures below normal while a shortwave trough brings the chance for rain Wednesday into Wednesday night. Moisture is limited on Wednesday with little return flow out ahead of the low in a northwest flow regime and and precip amounts will probably be less than a quarter inch. && .AVIATION /12Z TAFS THROUGH 12Z TUESDAY/... Issued at 628 AM EDT Mon Jun 22 2026 Patchy IFR conditions will persist across southern Lower Michigan into this morning then improve to MVFR as rain ends and clouds break up, North winds will gust to 25 knots today. && .MARINE... Issued at 221 AM EDT Mon Jun 22 2026 Winds and waves will become hazardous to swimmers and small craft this afternoon before decreasing late this evening. A Beach Hazards Statement and Small Craft Advisory has been issued for this afternoon and evening south of Pentwater. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...Beach Hazards Statement from 4 PM EDT this afternoon through this evening for MIZ043-050-056-064-071. MARINE...Small Craft Advisory from 4 PM this afternoon to midnight EDT tonight for LMZ844>848. && $$ DISCUSSION...Ostuno AVIATION...Ostuno MARINE...Ostuno

NWS GRR Office Area Forecast Discussion