037 FXUS63 KGRR 291751 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 1251 PM EST Mon Dec 29 2025 .KEY MESSAGES... - Snow/Wind Today - Light Snow Tuesday Night/Wednesday && .DISCUSSION... Issued at 256 AM EST Mon Dec 29 2025 - Snow/Wind Today Wrap around snow moving into Lower Michigan this morning as cold air rushes in on the back side of deepening low. Model cross sections of winds show 50 knots in the mixing layer this morning into early afternoon in the cold advection, and wind gusts could top 60 mph. Snow and blowing snow along with residual moisture icing up untreated roads will cause hazardous travel into this evening. Inversion heights drop below 5 kft tonight as the low pulls away and snow showers will slowly diminish into Tuesday morning. Snow showers and blowing snow could cause persistent travel problems into Tuesday morning west of US-131. - Light Snow Tuesday Night/Wednesday After a very brief break in the lake effect snow shower activity on Tuesday, a clipper low arrives on Tuesday night in fast northwest flow and lake-enhanced snow flares up again, persisting into Wednesday and possibly Thursday. Accumulations currently expected to be in the 1 to 3 inch range with the highest amounts closer to Lake Michigan. && .AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1246 PM EST Mon Dec 29 2025 Wind will slowly decrease as we progress through the afternoon and evening. Lake effect snow will continue through the period, although visibilities will slowly increase late tonight as the core of the cold air moves east from the lake. Another clipper will move toward the southwest Lower Tuesday morning and we`ll see an uptick in snow showers after 12z. && .MARINE... Issued at 256 AM EST Mon Dec 29 2025 No changes to the Storm Warning. Gales are occurring now and winds will increase this morning with the peak wind gusts over 50 knots expected between 7 AM and 2 PM today. Freezing spray is also expected through tonight. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...Winter Storm Warning until 7 PM EST this evening for MIZ037>040- 043-044-050-056-064-071-072. Winter Weather Advisory until 7 PM EST this evening for MIZ045- 051-057-058-065-066-073. Wind Advisory until 7 PM EST this evening for MIZ046-052-059-067- 074. MARINE...Storm Warning until 1 AM EST Tuesday for LMZ844>849. && $$ DISCUSSION...Ostuno AVIATION...04 MARINE...Ostuno

NWS GRR Office Area Forecast Discussion