BILLINGS — A few pulses of energy and moisture moved over Montana and Wyoming on Friday, and we had some light rain showers during the daylight hours. We'll also have isolated rain showers after sunset and overnight in a few areas, but most of the active weather moving our way won't arrive until Saturday. One cold front is already pushing over our area, and that will be followed by another later this weekend. That 1-2 punch of colder air combined with moisture from a Pacific storm will provide valley rain, mountain snow and much colder air Saturday and Sunday. Winter Weather Advisories and Winter Storm Warnings will be in effect for the mountains of southern Montana and northern Wyoming Saturday and Sunday.