553 FXUS63 KGRR 021723 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 123 PM EDT Fri Oct 2 2026 .KEY MESSAGES... - Clearing And Frost Tonight - Light Chance of Rain Sunday Morning, Then Frost/Freeze Possible && .DISCUSSION... Issued at 122 PM EDT Fri Oct 2 2026 - Clearing And Frost Tonight Post frontal dir air and associated high pressure has led to mainly some diurnal stratocu, which will diminish tonight leading to clear skies. This will cause temps to fall as radiational cooling takes hold into the 30s across much of the area. Frost advisory looks good across the interior counties of Central Lower Michigan. Probabilistic guidance suggests chances are low for temps to fall below freezing, but would not be surprised so see some of our cold hollows like Leota get that cold overnight. - Light Chance of Rain Sunday Morning, Then Frost/Freeze Possible A low chance of rain exists mainly north of M20 Sunday morning as a mid-level wave and associated moisture provide a glancing blow to our northern counties. A cold front crossing the area Sunday ends the low rain chances and marks the arrival of a notably cooler airmass. 850mb temps fall to near 0C across our interior north. Given light winds/high pressure/clear skies a favorable setup for frost, potentially freeze conditions, will be in place Sunday night across our northern two rows and Monday Night areawide. Otherwise, look for highs in the 60s and mild dewpoints making for comfortable fall conditions. && .AVIATION /18Z TAFS THROUGH 18Z SATURDAY/... Issued at 117 PM EDT Fri Oct 2 2026 VFR conditions will prevail through Saturday morning. The exception will be some thin stratocumulus bringing areas of MVFR conditions this afternoon with bases 2000 to 3000 feet AGL and tops AOB 3500 feet. North to northwest winds around 10 knots this afternoon dropping to around 5 knots this evening. && .MARINE... Issued at 122 PM EDT Fri Oct 2 2026 Ongoing Small Craft Advisory expires this evening as winds diminish with the approach of a high pressure system. Next window for hazardous winds and waves looks to be Saturday Night into Sunday ahead of a cold front, with the greatest risk north of Grand Haven based on current guidance trends. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...Frost Advisory from 10 PM this evening to 8 AM EDT Saturday for MIZ038>040-044-045. MARINE...Small Craft Advisory until 8 PM EDT this evening for LMZ844>849. && $$ DISCUSSION...Thomas AVIATION...Ostuno MARINE...Thomas

NWS GRR Office Area Forecast Discussion