From Fox News:
Aurora viewers will want to keep their eyes on the sky this weekend as solar flares from the Sun are hurling towards Earth.
NOAA has upgraded a geomagnetic solar storm watch from a Level 3 (“moderate”) to a Level 4 (“severe”) as several solar flares have combined. That could grace the northern tier skies with brilliant auroras but also trigger GPS problems, hamper satellite communication, and cause high-frequency radio blackouts. “Watches at this level are very rare,” NOAA stated in the watch. “This is an unusual event.”