Northern lights may be visible in parts of the U.S. Monday night following weekend solar storms. The sun burped out a huge burst of energy called a coronal mass ejection last week, prompting space weather forecasters to issue a rare,

NOAA forecast auroral activity with a Kp index of three on a scale of nine for Monday night, suggesting the aurora borealis will be more active and be seen farther away from the poles. The northern lights will likely be more active Wednesday night because of “minor” geomagnetic storms produced by a cooler,