The West Coast's rainy season has arrived in force, as an atmospheric river carrying moisture from the tropics joins a bomb cyclone off the Pacific Northwest coast. Heavy, wet snow began falling in the mountains on Nov. 19, 2024, and bursts of rain have been blasting the Oregon and Northern California coasts. These storms are forecast to last for days, hitting up and down the West Coast. Parts of Washington have seen more than 70 mph winds from the bomb cyclone.