Winter Weather in Helena Valley, Montana

NWS employee, along with numerous social media and broadcast media posts, reported intermittent light freezing rain in and around the Helena Valley. Well traveled roads remained fine for the most part, with lesser traveled roads becoming the most slick.

A deep upper level low centered just off the Pacific Northwest coast combined with remnants of an atmospheric river to result in a period of snow along western portions of the Hi-Line, including the Northern Rocky Mountain Front. Additionally, this moisture and mild temperatures aloft overran a cold surface airmass across Central Montana and resulted in two periods of freezing rain.