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    New: Official Warnings from National Meteorological Institutes Warning

    Warnings - East Helena

    World / United States / Montana / East Helena

    46°35'N / 111°54'W / Altitude 1185 m / 14:16 2026/04/21, America/Denver (UTC-6)

    warningSnow

    Winter Storm Watch issued April 20 at 11:33PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT

    From: 2026/04/20, 23:33
    To: 2026/04/21, 18:15

    * WHAT...Heavy snow possible. Total snow accumulations between 4 and 10 inches, with isolated higher amounts possible. Winds could gust as high as 50 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and Highwood Mountains, and Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From Wednesday evening through Thursday afternoon. * IMPACTS...Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree or power line damage.

    • Lewis and Clark
    • Remember, a Winter Storm Watch means that there is at least a 50% chance of impactful winter weather conditions during the watch period. To see a graphical representation of the degree of stress on young livestock please visit our webpage and select Local Programs then Cold Air Advisory for Newborn Livestock.
    • NWS Great Falls MT
    • 2026/04/20, 23:33