The high-pressure ridge in the west should retreat late this week, with a cold front due for the PNW by Saturday. Moisture will favor Canada and the PNW this weekend and slowly drag into the Rockies, allowing decent totals behind the cold front. While precipitation is not significant in the Rockies, the cold front could bring a few upside surprises.

A cold airmass will remain over the East this week with frequent snow showers for the Great Lakes and New England. A more widespread snow event is also expected later in the week. The West will be quiet this week with dry conditions and warmer temperatures. Storms will impact Northern BC and Alaska but rain

While a weak ridge has mostly dried the skies across Montana, a NW flow aloft delivered a few shortwaves across the NW corner of the state over the past 48-hours. Whitefish was the recipient of roughly 4” since Thanksgiving. The ridge axis off the PNW coast moves inland Sunday and resides over the state through Thurs. The ridge then weakens, allowing a weak storm Thu PM/Fri and another on Sat/Sun.

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.