Northern lights tonight in Montana

Montana sits at about 55° magnetic latitude, so the aurora reaches it from roughly Kp 5.5 — a few nights a year, on G2–G3 storms. The card below reads NOAA's oval, tonight's dark hours, the cloud and the Moon for Logan Pass, Glacier National Park right now.

Northern Montana is at 55–56° magnetic latitude with some of the darkest ground in the lower 48, so a Kp 5 night is worth the drive and Kp 6 brings colour. Glacier's Going-to-the-Sun Road is closed in winter; Lake McDonald's shore stays reachable and looks up the valley to the north. The Hi-Line — the Sweetgrass Hills and the plains east to Fort Peck — has a horizon that is simply the curve of the earth, which is what a 4° arc needs. Chinook winds clear the eastern sky in winter while the mountains hold cloud; check the two forecasts separately.