The AR will weaken on Tuesday and Wednesday, but continue to bring moderate snow to the southeastern half of Oregon. As the AR weakens, the semi-stationary storm off the PNW coast will bring snow showers through the Cascades on Wednesday and Thursday. Total snow accumulations will vary from 3-12 inches through the Cascades and 6-12+ inches from the AR. Cold air will keep snow levels low.

The Atmospheric River continues through the end of this week. Initial focal points are from the Sierra extending north into Idaho and Wyoming. Periodic cold fronts Wednesday over the Sierra and Northern Rockies, and again Friday will bring better quality. Cold air for the Rockies hits later this week, with snow pushing south into northern Utah and Colorado.

An active pattern will continue across the West this week with storms favoring the Northwest, Sierra, and Northern Rockies. Temperatures will be warm from the Sierra to Central Rockies early in the week but will trend colder later in the week. The Great Lakes and New England will also see several storms, though mixed precipitation could sneak in at times.

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.