textproduct: Grand Rapids
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Rain to Snow on Sunday night
- Lake Effect Snow and Windy on Monday
- Clipper Snow Thursday
DISCUSSION
Issued at 332 AM EST Sat Dec 27 2025
- Rain to Snow on Sunday night
A potent closed upper low and surface cyclone moves through Lower Michigan on Sunday with an area of warm advection precip ahead of the low moving in tonight. Unfortunately,there may be a period of freezing rain late tonight into Sunday morning in the northeast forecast area where freezing rain recently resulted in power outages. Temperatures should get above freezing there Sunday morning, alleviating the chance for more power outages at least until strong winds kick in Sunday night.
Rain changes to snow as cold air rushes in Sunday night along with strong wind gusts to 50 mph possible in strong cold advection. Moisture on the roads could freeze up then be covered in snow by Monday morning resulting in treacherous travel conditions.
- Lake Effect Snow and Windy on Monday
Low visibility in falling and blowing snow will also be a hazard into Monday afternoon. At this point it looks like 3 to 6 inches of snow across the western half of the forecast area and 1 to 3 inches across the east.
Inversion heights fall and lake effect snow diminishes on Monday night as the upper low pulls away.
- Clipper Snow Thursday
Fast northwest flow brings a short wave trough/clipper low late Wednesday New Years Eve into Thursday with some lake enhancement and the potential for travel impacts Thursday morning. At this point it appears snow amounts should be in the 1 to 3 or 2 to 4 inch range.
AVIATION /12Z TAFS THROUGH 12Z SUNDAY/
Issued at 615 AM EST Sat Dec 27 2025
IFR conditions will slowly improve to MVFR this morning across southern Lower Michigan while areas to the north remain MVFR. Rain and low clouds move in late tonight with conditions lowering to IFR by 12Z Sunday. East winds near 10 knots today into tonight.
MARINE
Issued at 254 AM EST Sat Dec 27 2025
Model soundings and cross sections of wind/mixing heights from the NAM and GFS show 50 knots in the mixing layer under a strong cold advection regime so a Storm Watch has been issued for Sunday night into Monday afternoon.
GRR WATCHES/WARNINGS/ADVISORIES
MI...None. MARINE...Storm Watch from late Sunday night through Monday afternoon for LMZ844>849.
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