027 FXUS63 KGRR 061908 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 308 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 /18Z TAFS THROUGH 18Z THURSDAY/... Issued at 140 PM EDT Wed May 6 2026 There is a 95 percent chance of all terminals remaining above IFR thresholds and an 85 percent chance of remaining above MVFR thresholds through 12Z Thursday. No visibility restrictions are anticipated. A scattered to broken layer around 6000-7000 feet AGL will diminish in coverage early tonight. Occasional gusts to around 20 knots at the terminals are expected to end around 00Z tonight. Although not mentioned in the TAFs for the sake of brevity, gusty winds are expected to return by late Thursday morning. && .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