The northern lights may return to the night sky over the Pittsburgh area on Wednesday.

Eruptions from the sun, known as coronal mass ejections, have occurred over the past few days. These eruptions interact with Earth's atmosphere and magnetic fields, resulting in a colorful display of the aurora borealis or northern lights.

The latest storm is considered a G4 or severe geomagnetic storm , and southwestern Pennsylvania is under a severe geomagnetic storm watch on Wednesday. While these can produce the northern lights, they can also interrupt radio, TV, satellite and cell phone communications.

When is the best time to see the northern lights?

The Space Weather Prediction Center, which is part of the National Weather Service, says its modeling indicates the energy from the storm w

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