Sunday and Monday bring the main event, and the models are tightly converged on a long-duration storm with heavy snow, strong northeast to north winds, and the best totals centered on northern Wisconsin and northern Lower Michigan. The main spread is not storm timing but exactly where the most intense band parks and how much the snow densifies Sunday afternoon, especially at the lower Michigan and southern Wisconsin hills.
A long, productive storm cycle will keep the Washington Cascades favored through Saturday afternoon, while Oregon stays warmer and more wind-affected. Confidence is highest from Wednesday morning through Saturday afternoon, when steady snow stacks up to 36"-57" at the biggest Washington winners, around 25"-34" at Mt Baker, and a denser but still healthy 34"-46" at Timberline.
