MARYSVILLE, Calif. — Caltrans is alerting motorists about a winter storm on its way to the Sierra Nevada that could create challenging mountain travel conditions today and Thursday.

The National Weather Service is forecasting up to 10 inches of snow above 4,000 feet with gusty winds up to 45 mph affecting several mountain passes over the next two days.

A winter weather advisory is in effect from 4 p.m. today through 10 p.m. Thursday. Motorists should be prepared for potential chain controls, additional travel times and possible delays.

In the Sacramento Valley, the best chances for rain are forecast north of I-80 with precipitation amounts between 0.1 and 0.5 of an inch, with upwards to an inch of rain possible in the foothills.

Motorists are encouraged to check Caltrans’ QuickMap before traveling for current road conditions and chain requirements or download the QuickMap app from the App Store or Google Play.

Road information is also available on Caltrans’ website or by calling the California Highway Information Network automated phone service at 1-800-427-ROAD (7623).

Caltrans District 3 is responsible for maintaining and operating 4,385 lane miles in 11 Sacramento Valley and Northern Sierra counties. The department will issue updates on X @CaltransDist3 and on Facebook CaltransDistrict3.