An area storm is prompting chain controls on some mountain highways. 

Chains are required on portions of Mt. Rose Highway and I-80 over Donner Summit. 

A quick moving weather system will produce light snowfall amounts around Lake Tahoe and northeast California.

A second storm system brings a better chance for mountain snow and valley rain Friday evening into Saturday.

Drier and cool conditions prevail Sunday into early next week, with a reinforcing cold front possibly bringing shower chances around Tuesday night.Â