G3 geomagnetic storm could bring the northern lights to the U.S. on Sunday night, after three CMEs caused aurora displays across Europe and North America Saturday.

The northern lights could be visible across parts of the US this weekend. Here's which states may see auroras and how to spot them.

A northern lights display could light up parts of the Northeast tonight. See the latest aurora forecast, map and best viewing times for NJ, NY and PA.

The ideal window of time to observe the northern lights typically is 10 p.m. to 2 a.m. High vantage points and places with little to no light pollution can improve visibility of the aurora borealis. The moon will be 27% illuminated Monday night for its waning crescent phase.

Possibly. NOAA is forecasting additional geomagnetic activity through the weekend, and astronomers note that multiple incoming CMEs could extend aurora opportunities beyond Friday night. Whether the northern lights become visible in Pennsylvania will depend on the strength of the storms, cloud cover and local viewing conditions.

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