Activity from the sun could create displays of the aurora borealis across the northern half of the United States this weekend.
The sun has produced multiple solar flares and associated coronal mass ejections over the past week, most of which had glancing blows to Earth. But the timing has finally lined up, and NOAA's Space Weather Prediction Center issued a Strong (G3) Geomagnetic Storm Warning for Friday into Saturday.
The SWPC said the latest geomagnetic storm alerts are due to influences from the ongoing Coronal Hole Highspeed Stream and CME that left the sun on Wednesday.
Who could see the northern lights tonight?
The current forecast calls for a maximum KP-index of 7 out of 9, which could mean those as far south as Pennsylvania could see faint aurora lights, and skywatchers from Illinois to Oregon could see brighter displays.
