If you're in a northernly latitude, you might look for the northern lights in tonight's sky. A Coronal Mass Ejection (CME -- a big stew of protons and electrons spit out from the Sun) hit the Earth at about 1:30 pm EDT today, and another is on its way. Conditions are fair, solar scientists say.
Here's an auroral forecast. This storm currently has a Planetary Index (Kp) of about 5, so the site predicts a possible auroral viewing north of curve from Calgary, to northern Minnesota, to Halifax. Hardly any of the U.S. But that might change.
I've seen the northern lights only once, in New Hampshire, on a summer night around
PS: Sorry to demonstrate a Northern Hempisphere bias here. I don't have any information/sites about the potential for southern lights.