BOZEMAN – An “atmospheric river” is pouring deep rich sub-tropical moisture from just north of Hawaii up into the Pacific NW and western Canada.
Forecast models show this rich moisture feed will drop through western, central and SW Montana in a NW flow aloft. A steady stream of warm moist air will bring a long duration wet weather pattern to most of Montana.
A heavy wet snow will begin to develop Wednesday evening and continue all day Thursday. Re-develop again Thursday night and finally fall apart by Friday afternoon.
Due to the long duration of this storm system the National Weather Service has issued Winter Storm Warnings and Winter Weather Advisories tonight through Friday morning.
Thursday morning, Thursday evening, and Friday morning commutes will be impacted by this storm.
A fast-paced disturbance will drop through Montana Saturday and could produce another shot of snow locally with minor accumulations. Behind this front temperatures will be a little cooler by Sunday.
Next week a surge of Arctic air will drop back down into Montana and knock temperatures down significantly beginning Tuesday of next week.
