954 FXUS63 KGRR 211655 AFDGRR Area Forecast Discussion National Weather Service Grand Rapids MI 1155 AM EST Sun Dec 21 2025 .KEY MESSAGES... - Strong Winds subside this morning - Showers with light accumulations Monday - Warm Weather Ahead && .DISCUSSION... Issued at 330 AM EST Sun Dec 21 2025 - Strong Winds subside this morning The northwesterly flow will continue this morning. However the gradient continues to slacken as the LLJ moves eastward. Will allow Gale and wind advisory to expire at 4 AM. High pressure will build over the region today with mild warm air advection. Highs will remain in the 20s. - Showers with light accumulations Monday A warm frontal boundary tomorrow with a negatively tilted mid level trough will allow for enough moisture and convection for snow showers, primarily north of the I 96 corridor. Moisture is limited so accumulations will be limited to an inch or less. The highest accumulations are possible along the US 10 corridor. As the warm front continues to lift to the north the showers will transition to a wintry mix then to a chance of rain Monday night. - Warm Weather Ahead Temperatures continue to trend warmer through the week. A large Quasi stationary high located over the Gulf will dominate the pattern this week. There remains some zonal flow late in the week, however confidence is low on timing and QPF amounts. Rain remains possible Christmas Day. Temperatures through the week continue to trend above normal. However, they are trending slightly lower in recent runs. Temps on Christmas are ranging from around 40 along US 10 to the low 50s along the I 94 corridor. That equates to 5 to 15 degrees above normal respectively . && .AVIATION /18Z TAFS THROUGH 18Z MONDAY/... Issued at 1155 AM EST Sun Dec 21 2025 Lingering MVFR cigs at GRR and MKG will lift to VFR over the next few hours before scattering out tonight. A warm front crossing the area Monday morning will lead to ceilings lowering to 7-10kft areawide. A low (30%) chance of snow showers exists at MKG/GRR/LAN Monday morning, with low-level dry air being the main limiting factor. Have gone with a PROB30 for now as a result. Northwest winds today around 5-10 knots shift to southerly with the passage of the warm front. && .GRR WATCHES/WARNINGS/ADVISORIES... MI...None. MARINE...None. && $$ DISCUSSION...Ceru AVIATION...Thomas

NWS GRR Office Area Forecast Discussion