Illinois residents have a chance of seeing the aurora borealis again tonight, less than a month after the lights last dazzled the skies .

Over the weekend, scientists with NOAA's Space Weather Prediction Center caught a powerful coronal mass ejection (CME) expected to collide with Earth's upper atmosphere sometime Monday.

Federal forecasters on Dec. 8 released an aurora forecast map that includes nearly a dozen U.S. states with chances to see the northern lights directly overhead. The southern-most viewing line slices just north of Illinois, but that doesn't rule out the state's chances.

A different forecast model by the Geophysical Institute at the University of Alaska paints a rosier outlook. It predicts the northern lights might be viewable low on the horizon as far south a

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