228 FXUS63 KGRR 101743 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 143 PM 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 /18Z TAFS THROUGH 18Z MONDAY/... Issued at 143 PM EDT Sun May 10 2026 VFR conditions are highly likely at all terminals through 00Z this evening (95 percent chance) and through 06Z tonight (90 percent chance). Wind gusts mostly from the west and northwest are expected to diminish around 00Z this evening with winds eventually becoming light to calm. A cold surface airmass early Monday morning could result in the colder air draining to lower elevations, resulting in light winds having a direction more associated with local topography than with synoptic forcing. && .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...Freeze Warning from midnight tonight to 8 AM EDT Monday for MIZ037>040-043>046. Frost Advisory from midnight tonight to 8 AM EDT Monday for MIZ050>052-056>059-064>067-071>074. MARINE...None. && $$ DISCUSSION...Ostuno AVIATION...TJT MARINE...Ostuno

NWS GRR Office Area Forecast Discussion