A G1 (Minor) geomagnetic storm is predicted to peak between 11:00 p.m. on Tuesday, July 1, and 5:00 a.m. on Wednesday, July 2, 2025. This is due to a coronal mass ejection (CME) from the Sun.
The CME is expected to reach Earth, potentially bringing the aurora borealis, or Northern Lights, to parts of the United States. The National Oceanic and Atmospheric Administration (NOAA) issued the storm watch on June 30, 2025.
The aurora will be most visible in northern states like Washington, Idaho, and Montana. Optimal viewing conditions involve dark, clear skies away from light pollution, preferably between 10 p.m. and 2 a.m. local time.
The aurora borealis is caused by charged particles from the Sun interacting with Earth's magnetic field. This excites atmospheric gases, creating colorful light displays. Refer to NOAA for updates.