322 FXUS63 KGRR 301805 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 205 PM EDT Thu Apr 30 2026 .KEY MESSAGES... - Cold with Frost/Freeze conditions into Saturday - Below Normal Temperatures Dominate the First Week of May && .DISCUSSION... Issued at 205 PM EDT Thu Apr 30 2026 - Cold with Frost/Freeze conditions into Saturday We have issued a Freeze Warning for the north interior forecast area and a Frost Advisory surrounding that area. Temperatures are expected to be slightly colder than last night, but clouds should once again impede widespread frost formation. Friday night will see the cold air remain in place along with lower dew points and mostly clear skies, allowing temperatures to tank into the 20s across much of the interior CWA and at or below 32F elsewhere. So a Freeze Watch is in effect across the entire forecast area. - Below Normal Temperatures Dominate the First Week of May Persistent upper troughing is in store for the Great Lakes region through next week, with near normal temperatures early in the week crashing to about 10 degrees below normal by the end of the week with more freezing conditions possible across the northern interior at least. The good news is that no heavy rain or severe weather is expected in the dominant northwest flow regime. && .AVIATION /18Z TAFS THROUGH 18Z FRIDAY/... Issued at 128 PM EDT Thu Apr 30 2026 Scattered to broken vfr cu was noted on latest visible imagery. Upstream cloudiness will move across the terminals tonight as low pressure moves across northern IN. Light rain is possible at the I-94 terminals and a prob30 group was added for this. && .MARINE... Issued at 205 PM EDT Thu Apr 30 2026 Winds and waves are currently forecast to remain below SCA conditions through Saturday. There could be brief gusts to 25 knots at times on Friday, with a better chance on Sunday as low pressure approaches from the northwest and southwest winds increase. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...Frost Advisory from 2 AM to 8 AM EDT Friday for MIZ037-043>046- 051-052. Freeze Watch from late Friday night through Saturday morning for MIZ037>040-043>046-050>052-056>059-064>067-071>074. Freeze Warning from 2 AM to 8 AM EDT Friday for MIZ038>040. MARINE...None. && $$ DISCUSSION...Ostuno AVIATION...04 MARINE...Ostuno

NWS GRR Office Area Forecast Discussion