Chicago, Illinois – A strong geomagnetic storm is expected to impact Earth late Thursday into Friday, potentially lighting up skies across northern U.S. states and briefly affecting some power and satellite systems. The National Weather Service’s Space Weather Prediction Center issued a G3 (Strong) Geomagnetic Storm Watch for November 6–7, as a coronal mass ejection (CME) races toward Earth.
According to NOAA forecasters, the CME erupted from the Sun early Wednesday and is projected to reach Earth as early as Thursday evening EST. When it arrives, the surge of solar particles could trigger vibrant auroras visible from parts of the northern Plains, Midwest, and Pacific Northwest—including areas as far south as Ohio and Oregon.
G3 storms are uncommon but not rare, and can cause intermittent issues with satellite navigation, shortwave radio, and high-latitude power grids. The SWPC notes that voltage corrections may be required on some systems and that low-Earth-orbit satellites could experience increased drag. However, most effects are expected to be limited and temporary.
Skywatchers across the northern tier are encouraged to monitor local skies after sunset Thursday and again Friday night. Ideal viewing conditions will depend on cloud cover and light pollution. Residents should also stay alert for potential updates as the CME’s orientation determines how strongly it interacts with Earth’s magnetic field.
