715 FXUS63 KGRR 060635 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 235 AM EDT Wed May 6 2026 .KEY MESSAGES... - Frost and Freeze Conditions Early Thursday - Cool with Occasional Rain Chances && .DISCUSSION... Issued at 235 AM EDT Wed May 6 2026 - Frost and Freeze Conditions Early Thursday Another round of frost and freeze conditions is expected tonight into Thursday morning. 925 temperatures around 1 to 2C with a weak to moderate inversion, clearing skies, and light winds will cause temperatures to drop into the low to mid 30s across the area. Another Frost Advisory and Freeze Warning will be needed. Continue to take actions to protect any sensitive vegetation. - Cool with Occasional Rain Chances The upper level low will remain over the Hudson Bay area keeping troughing over the Great Lakes. Several shortwave troughs are expected to bring chances for rain through the weekend. Troughing will also keep the cooler temperatures in place with highs in the 50s to low 60s. The only exception will be Saturday where highs could approach 70. Lows will be in the 30s and 40s with northern portions of the forecast area likely to see continued frost concerns. Any rainfall looks to be light with probabilities of an inch or more in 72 hours less than 20 percent through the forecast period. Ensembles are in agreement overall with rain chances other than some slight timing differences. The best chances (50 percent) for rain will be along and south of I-94 Friday afternoon and evening as a vorticity maximum tracks largely south of the area and then Saturday night into early Sunday morning mainly along and south of I-96. && .AVIATION /06Z TAFS THROUGH 06Z THURSDAY/... Issued at 235 AM EDT Wed May 6 2026 VFR conditions are expected through Wednesday night. Clouds will briefly clear this morning before filling back in during the afternoon. Northwest winds are expected to gust around 20 knots this afternoon before becoming light and variable this evening. Clouds will clear once more Wednesday night. && .MARINE... Issued at 235 AM EDT Wed May 6 2026 Northwest winds today become more westerly tonight then shift to the southwest Thursday. 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...Frost Advisory until 8 AM EDT this morning for MIZ037-043>046- 051. Freeze Warning until 8 AM EDT this morning for MIZ038>040. MARINE...None. && $$ DISCUSSION...RAH AVIATION...RAH MARINE...RAH

NWS GRR Office Area Forecast Discussion