BUTTE Mont: – This week’s weather patter will be dominated by two types of weather. First is a blocking high pressure ridge keeping our weather pattern dry and decent travel through Thursday morning. This ridge pattern will break down allowing a deep trough of Low pressure to dig into the northern Rockies beginning Thursday night west of the divide and across the rest of the state by Friday.
A NW flow will develop Friday through Sunday and allow pacific moisture to pass through the state and hold temperatures down.
Medium range snowfall forecasts show an increasing chance for rain/snow for the lower valleys Friday and high mountain snow and a better chance for snow at all levels by Friday afternoon through Sunday morning. Keep in mind it’s very difficult to forecast exact totals this far in advance and as we get closer to the weekend our forecast models will begin to paint a clear picture on impacts to travel Friday through Sunday.
In general, if you are making travel plans much of the western half of the country will be dry and mild Wednesday into Thursday. That will likely change to cold and wet with travel concerns Friday into Saturday across Montana throughout the pacific NW. Updates will be provided here daily throughout the rest of the week.
City by City Forecast:
BOZEMAN: LOW: 17°; HIGH TUESDAY: 42°. Clear and cold overnight but mostly sunny and warming nicely into the lower 40s Tuesday afternoon.
BUTTE: LOW: 8°; HIGH TUESDAY: 43°. Another clear and cold night for Butte with lows falling close to 0°. Mostly sunny and mild by late afternoon.
DILLON: LOW: 18°; HIGH TUESDAY: 46°. Mostly clear and chilly tonight for Dillon and sunny and mild by Tuesday afternoon.
WEST YELLOWSTONE: LOW: -3°; HIGH TUESDAY: 37°. Bitterly cold for West Yellowstone under clear skies temperatures will fall slightly below zero by morning. Late afternoon temperatures should climb above freezing.