NEEDHAM, Mass. —

With skies expected to clear over the Boston area tonight, there's a good chance for Massachusetts residents to see the Northern Lights before bedtime.

The Space Weather Prediction Center issued a rare G4-level watch for Tuesday, with an estimated arrival time of approximately 8 p.m.

"This has to do with two overlapping (coronal mass ejections) that should combine just before reaching Earth," explained Kelly Beatty, of Sky and Telescope . "This could be a very good night for auroras, if the sky clears."

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StormTeam 5 is forecasting partly cloudy skies through 8 p.m., but conditions are expected to clear after that point.

According to the SWPC, the aurora caused by this CME may be visible "as fa

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