The weather is expected to turn to the worse once again, starting with a wind watch in effect through Friday that could bring 80 mph wind gusts to the mountains.
The forecasts also call for rain and snow with temperatures expected to again drop far below zero by Sunday.
The wind could create dangerous driving conditions and icy roads and blowing snow as well as power outages, while the cold and wind chill late in the weekend could cause frostbite to exposed skin in less than 30 minutes, the National Weather Service release said.
National Weather Service issued a high-wind warning through Friday, with sustained winds from 40 mph or higher and gusts to 65 mph on the plains and up to 80 mph in the mountains.
Rain is in the prediction for Havre today - the high is forecast at 37 degrees and the low at 36 degrees - with rain and snow expected Friday and more snow Saturday.
But the temperature is expected to plummet. Weather service predicted a high Friday of 33 degrees, with the low dropping to 4 degrees Friday night and minus 10 Saturday with a high of minus 6 and a low of minus 25 for Sunday.
A Weather Service alert reports that a worst-case scenario could bring lows of minus 30 to minus 40 to Havre Monday morning.
The forecast by The Weather Channel is similar, with lows predicted of 31 tonight and 7 Friday night, dropping to a forecast low for Saturday of minus 17.
The Weather Channel predicts the high Sunday to reach minus 15, with the low dropping to minus 19. The Weather Channel also gives a high chance of precipitation Friday with a good chance Saturday and a smaller chance the rest of the period.