An atmospheric river event will bring widespread rain and mountain snow to much of Northern California, prompting CBS Sacramento to issue a First Alert Action Day for Thursday.

While rain arrives late Wednesday night, the most intense part of the storm is expected early Thursday morning between 3 a.m. and 10 a.m., when heavy rain and strong wind gusts move through the Valley.

Here's what you should know.

Wind advisory and rain in the valley

Rain is expected to reach the Sacramento Valley late in the evening, with radar showing the leading edge around 8 p.m. and steadier rain by 10 or 11 p.m.

By Thursday morning, expect widespread heavy rain and gusty winds up to 50 miles per hour. This could cause flooding, especially in areas with poor drainage or leaf-clogged storm drains, and isola

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