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.

Imagine looking up on a dark winter night to see rippling ribbons of green and purple light dancing across the sky. The Northern Lights, or aurora borealis, are nature’s ultimate sky show – an ethereal phenomenon that has captivated humans for millennia.

The Kp index is a scale from 0 to 9 used to measure geomagnetic activity. The higher the number, the more likely auroras are to be visible at mid-latitudes, away from the poles. NOAA currently predicts the Kp index will peak at 6 in the middle of the night tonight.