178 FXUS63 KGRR 062346 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 746 PM EDT Wed May 6 2026 .KEY MESSAGES... - Frost and Freeze Conditions Thursday Morning - Cool with Rain Possible Through The Weekend && .DISCUSSION... Issued at 256 PM EDT Wed May 6 2026 - Frost and Freeze Conditions Thursday Morning Some of the guidance did trend warmer. However, 850 mb temperatures will be colder than last night. Couple that with drier air, calming wind and a moderate inversion and widespread frost development with freezing temperatures north of 96 remain likely. As such, a slightly expanded freeze warning has been issued with a frost advisory for the rest of Lower Michigan. Please take action to protect any sensitive vegetation. - Cool with Rain Possible Through The Weekend A large upper level low currently situated over Hudson Bay will dominate the weather pattern through the rest of the week and through the weekend. The upper level low will retrograde as it rotates. As it does this, it will swing through mid and upper level short waves through the first half of next week. This pattern will keep cooler temperatures over the Great Lakes with periods showers possible in the afternoon and evening timeframe. The best chance for showers will be the the front that is still expected to move through late Saturday into Sunday. Best chances remain along and south of I 94. && .AVIATION /00Z TAFS THROUGH 00Z FRIDAY/... Issued at 746 PM EDT Wed May 6 2026 IFR conditions are not anticipated. Main changes this update was to explicitly mention gusts developing Thursday afternoon. Additionally, expect more cloudiness during the day Thursday with a broken layer generally above 5000 feet AGL. && .MARINE... Issued at 256 PM EDT Wed May 6 2026 Winds will be out of the west and shift to the north overnight Winds will remain below criteria through the end of the week. Gusts may approach Small Craft Advisory levels Saturday before the front moves through Saturday night into Sunday. Northwest winds and then expected for Sunday and Monday. Waves are expected to be around 2 feet or less through the forecast period. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...Freeze Warning from 1 AM to 8 AM EDT Thursday for MIZ037>040- 044>046. Frost Advisory from 1 AM to 8 AM EDT Thursday for MIZ043-050>052- 056>059-064>067-071>074. MARINE...None. && $$ DISCUSSION...Ceru AVIATION...TJT MARINE...Ceru

NWS GRR Office Area Forecast Discussion