Geomagnetic storm conditions are expected on Saturday night, likely pulling the northern lights further south below the Canadian border, according to a National Oceanic and Atmospheric Administration forecast. (Here’s an updated forecast for Sunday night.)

The sun ejected a sizable solar flare earlier in the week and it's going to cause the northern lights to stretch down into the US.

People in the northernmost states may have a chance to see auroras glowing in the northern sky tonight.