Once the cooler air is in place, the door is open for the first measurable snow for the Cascades and the northern Rockies.
Several states were under winter weather-related alerts from the National Weather Service (NWS) early Thursday, with some areas expected to receive up to 10 inches of snow.
A stretch of warm, sunny days will give way to storms Saturday night, followed by a sharp drop in temperatures and the return ...
The National Weather Service has issued winter weather advisories for Colorado and Wyoming until Tuesday evening.