547 FXUS63 KGRR 081904 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 204 PM EST Sun Nov 8 2026 .KEY MESSAGES... - Mild and dry through mid week - Showers mid week, then cooler && .DISCUSSION... Issued at 204 PM EST Sun Nov 8 2026 - Mild and dry through mid week Systems are moving across the Great Lakes quickly. A short wave over southern Ontario nosing into eastern Lower is presently moving east and clouds are rapidly dissipating as ridging moves in. This short wave ridge will move overhead tonight and Monday morning before warm air advection clouds associated with the next short wave trek east from Wisconsin Monday afternoon. The atmosphere is dry and we won`t see any precipitation from those clouds. The weak ridging (h8 temps near +8c) for the next few days will keep high temperatures above normal through Wednesday with highs in the 55-60 degree range. - Showers mid week, then cooler The next chance of rain is Wednesday afternoon (30%-40%). An eastern Pacific short wave will move across the Rockies and carve out a mid Mississippi Valley trough. That, in turn, will pull short wave energy south from southern Canada resulting in a higher amplitude trough over the eastern half of the country. We may see some light rain from the various short waves moving through the flow. Highest pops will be near the lake shore were a north/south band of lake enhanced rain will develop...aided by the colder air drawn south into the upper trough. H8 temperatures will fall to -8c by Friday morning as colder air flows south in the trough. That`ll result in highs in the mid 40s again. Generally dry conditions are expected beginning Thursday and carrying through next weekend as the effects of the upper trough move east. && .AVIATION /18Z TAFS THROUGH 18Z MONDAY/... Issued at 1239 PM EST Sun Nov 8 2026 Current MVFR ceilings around 1500 feet will scatter out in the next 2 hours. Westerly winds with gusts around 25 knots will continue through the afternoon before an inversion builds in this evening. Winds become more northwesterly bringing in some cloud cover from the north along with lake effect clouds. The chance for ceilings below 3000 feet is 30 to 50 percent for AZO and MKG this evening and increasing to 50 to 70 percent Monday morning with MKG having the higher probabilities. These lower ceilings may approach GRR Monday morning, but higher probabilities are that GRR remains VFR. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...Small Craft Advisory until 5 AM EST Monday for LMZ844>849. && $$ DISCUSSION...04 AVIATION...RAH

NWS GRR Office Area Forecast Discussion