623 FXUS63 KGRR 082343 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 643 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 /00Z TAFS THROUGH 00Z TUESDAY/... Issued at 643 PM EST Sun Nov 8 2026 The inversion is building in with lighter westerly winds at the surface. Cloud cover from the north will gradually shift south although confidence is not high that BKN ceilings will make it to GRR and LAN. Winds will become more northwesterly behind the front tonight resulting in some lake effect cloud development. The signal for some MVFR ceilings continues for MKG and AZO, therefore continued a mention of BKN ceilings around 2500 to 3000 feet between 8Z and 15Z Monday morning. Otherwise VFR conditions are expected into Monday with SCT to BKN high clouds and westerly winds around 5 to 15 knots. && .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