Moisture will overspread the Sierra Wednesday night, with moderate totals and colder temperatures. A stronger storm with a warm front will bring double digits to the Sierra, Pacific Northwest, western BC, and a few spots in the Rockies.

We will remain in a quiet pattern from Wed to Fri with mostly cloudy skies and occasional flurries. A stronger storm will arrive over the weekend with moderate to heavy snow possible from later Saturday and into Sunday. A weaker follow-up storm is possible Mon-Tue (Dec 16-17). From Dec 19 to 25, the pattern looks mostly dry & mild but we could see some occasional snow sneak in.

A ridge of high-pressure remains over the Northern Rockies through Thursday. A weak storm clips the western border (Lookout Pass /Lolo Pass) on Thurs PM – Fri AM that could bring an inch or two. The next storm on Sat-Sun is trending weaker, but widespread light accumulations are likely on both days. Unsettled skies last into early next week, with daily chances of light accumulations possible.

The West will see some welcome snow late this week and into the weekend after a drier start to December. A weak storm will move through on Thursday followed by a stronger storm Friday-Sunday. The Sierra (including Tahoe), Cascades, BC, and Northern Rockies will be favored for the deepest snow totals. The East will see rain & some snow Wed-Thu & again early next week with a warmer airmass in place.

Thanks for reading this summer! For the rest of this week, a cold front moving across the Central Rockies will bring showers & t-storms to WY, CO, & NM Wed-Thu while the West Coast states will see a late-season heat wave. Next week, isolated to scattered showers & t-storms develop across the West with continued mild temps. Heading into mid-month, the PNW will trend wetter and cooler.