501 FXUS63 KGRR 100621 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 221 AM EDT Sun May 10 2026 .KEY MESSAGES... - Frost/Freeze Next Couple Nights - Rain Chances Tuesday and Late Week && .DISCUSSION... Issued at 221 AM EDT Sun May 10 2026 - Frost/Freeze Next Couple Nights Canadian surface high builds in tonight with clear skies and light winds leading to frost/freeze conditions for all of the forecast area. This should be the coldest night of the week since the sfc high is moving east Monday night and clouds may be moving in late in the night but temperatures could still fall below freezing in the cold spots where winds stay decoupled. - Rain Chances Tuesday and Late Week A clipper low moving in the fast northwest flow arrives on Tuesday with the first widespread rain this month. QPF expected to be around a quarter inch with some isolated half inch amounts possible with scattered convection Tuesday evening. Flow goes more zonal late week and deeper moisture streams up from the Gulf ahead of a shortwave trough that arrives Friday or Saturday with showers and scattered convection. && .AVIATION /06Z TAFS THROUGH 06Z MONDAY/... Issued at 221 AM EDT Sun May 10 2026 VFR conditions will continue through Sunday evening. North winds will gust over 20 knots at times this afternoon. && .MARINE... Issued at 221 AM EDT Sun May 10 2026 Light winds and waves will continue into Tuesday then a Small Craft Advisory will be needed for late Tuesday into Wednesday as high pressure moves east and south winds increase to 30 knots. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...Frost Advisory until 8 AM EDT this morning for MIZ037-043>046. Freeze Warning until 8 AM EDT this morning for MIZ038>040. MARINE...None. && $$ DISCUSSION...Ostuno AVIATION...Ostuno MARINE...Ostuno

NWS GRR Office Area Forecast Discussion