Northern Lights Expected to Dazzle Skies Across Canada and 18 U.S. States Tonight

Washington, D.C., September 1, 2025 - A powerful solar eruption over the weekend has set the stage for a spectacular auroral display Monday night into early Tuesday, with the northern lights forecast to shimmer across much of Canada and parts of the United States.

According to the U.S. National Oceanic and Atmospheric Administration’s Space Weather Prediction Center, a coronal mass ejection (CME) launched from the Sun on August 30 is expected to impact Earth’s magnetic field late Monday, triggering a moderate G2 geomagnetic storm that could intensify to strong G3 conditions as the main CME body passes overhead. Forecasters predict the geomagnetic storm will peak between 2 a.m. and 5 a.m. ET on Tuesday, providing the best window for aurora viewing.

In Canada, the charged-particle onslaught promises “the best chance to see the shimmering lights since spring,” with displays potentially visible from the Prairies through Ontario and Quebec. Darkness falling earlier in September further improves viewing prospects for skywatchers in the northern provinces.

In the United States, NOAA modeling suggests the aurora may extend far beyond its usual Arctic confines. Observers in up to 18 states could glimpse green and red curtains lighting the northern horizon. States most likely to experience the display include Alaska, Idaho, Minnesota, Wisconsin, Michigan, New York, Vermont, New Hampshire and Maine, with potential sightings as far south as Missouri, Colorado and Virginia if skies remain clear.

Meteorologists emphasize that local weather conditions and light pollution will heavily influence visibility. Ideal viewing sites are away from urban light sources, with a clear view of the northern sky. Experts recommend allowing at least 15 minutes for eyes to fully adjust to darkness and using a tripod for long-exposure photography to capture faint auroral details.

Skywatchers in both countries are urged to monitor space weather updates, as auroral forecasts can change rapidly once Earth’s magnetosphere begins interacting with incoming solar particles. With peak activity expected overnight, tonight offers a rare opportunity to witness one of nature’s most mesmerizing light shows.