In the Midwest, northern Minnesota, Wisconsin and Michigan’s Upper Peninsula could all see aurora formation Sunday night, according to NOAA’s forecast. Most of North Dakota, Alaska and a large portion of Montana could also see the lights, while small slivers of extreme northern Idaho and northeastern Washington are also within the view line.

Space weather experts warn that a moderate-strength geomagnetic storm could hit Earth Friday or Saturday (Aug. 8 or 9) — possibly bringing auroras to northern U.S. skies.