* Rain and mountain snow expected for much of California and southern Oregon today and tonight

* Some rain and mountains snow showers expected tonight for western parts of Oregon and Washington

* A few snow showers are possible tonight in higher elevations of the Great Basin

* Breezy/windy conditions possible along the California Coast and in some valley locations

* Chilly temperatures expected in the Highs Plains and Rockies

* Highs will range from the teens in the higher elevations of the Colorado Rockies to the 70s in southern Arizona