NWS Forecast Office Great Falls, MT

Areas of dense fog are likely to be present across portions of north central Montana through much of tonight including areas from Cut Bank south to Great Falls and east to Lewistown. Visibility may be less than ½ mile at times in these areas. Be prepared for sudden changes in visibility, and make sure to slow down, use your low-beams, and allow plenty of space between vehicles in areas of fog. In addition, many roadways are already icy or snow-covered which may further reduce stopping distance. As clouds thin later tonight farther east across north central Montana, there is potential for dense fog to develop in the Havre and Chinook areas as well.