Winter 2024 Predictions Oregon. Snowchance calculates the likelihood of a winter storm entering a region on a specific day. Washington, oregon, northern idaho, montana, the upper midwest, and much of new england are in the probability of.

Washington, oregon, northern idaho, montana, the upper midwest, and much of new england are in the probability of. Chance is a prediction of how ideal the conditions are for a storm to enter the region.