Boulder, CO – A geomagnetic storm may light up the skies across the northern United States as early as Tuesday evening, with possible aurora sightings extending through Wednesday.
According to the NOAA Space Weather Prediction Center in Boulder, Colorado, a G2-level (Moderate) geomagnetic storm watch is in effect for April 16, 2025, following the eruption of two coronal mass ejections (CMEs) from the Sun on April 13. The CMEs are projected to reach Earth’s outer atmosphere late on April 16, with residual effects lasting into April 17.
If G2-level conditions occur, residents across northern and upper Midwest states—including areas from New York to Idaho—may catch a glimpse of the northern lights, especially under clear nighttime skies. While G2 geomagnetic storms are considered moderate, they can still cause brief disruptions to high-frequency radio communications and impact power grid fluctuations at higher latitudes.
Officials recommend monitoring NOAA’s aurora forecasts and space weather alerts. Residents in affected regions should consider minimizing GPS and communication device use if interference is detected and remain alert for updates through April 17.
This storm watch is part of NOAA’s ongoing effort to safeguard society with timely and actionable space weather alerts.
