The storm is predicted to be a moderate atmospheric river, and nowhere near the strength of an “Ark storm,” as has been making the rounds on social media in the past few days. Nor is the forecast likely to be anywhere near as severe as the series of back-to-back storms last winter that led to widespread flooding and historic amounts of snow in the region.
This midweek storm, while still having the potential to produce flash flooding and heavy mountain snow, is expected to move quickly, which would reduce the amount of rain that falls over any one location.
A foot or more of snow is forecast over parts of Northern and Central California. The Sierra Nevada will get heavy snow from late Wednesday morning into Thursday.
Here’s what to know about the timing.
Tuesday: Light rain will spread over the Pacific Northwest.
Wednesday: A more robust plume of moisture will move over California, with the heaviest rain falling over the northern Bay Area and the Sacramento area Wednesday afternoon before drifting farther south in the evening and overnight.