WESTERN U.S. — A major pattern change is taking shape across the West as a colder, more active storm track develops through the end of October. Several Pacific storm systems could bring widespread rain, colder temperatures, gusty winds, and accumulating mountain snow over the next two weeks. Extended outlooks favor above-normal precipitation across much of the region. The pattern looks increasingly favorable for meaningful early-season snowfall.
Above-Normal Precipitation Across the West
Extended-range outlooks favor wetter-than-normal conditions across California, Nevada, Arizona, Utah, Idaho, Colorado, New Mexico, Wyoming, and Montana. Several rounds of rain and snow are expected as colder upper-level troughs move inland.
The moisture would be beneficial for many areas after a long, dry stretch. Lower elevations are more likely to see rain, while higher terrain picks up snow.
Heavy Snow in the Sierra and Cascades
The Sierra Nevada stands out for heavy snow potential, especially east of Sacramento, Modesto, and Fresno and near Carson City. Mountains near Redding and Medford also show strong signals.
The Cascades from Seattle south through Portland, Eugene, and Bend are also in line for significant mountain snow. Rain is more likely in lower valleys and along the coast.
Northern Rockies Snow Near Missoula and Butte
Some of the heaviest snow signals appear across the northern Rockies in Idaho and Montana. Mountains near Missoula, Butte, Lewiston, and La Grande show high totals…