A stronger northern lights forecast is raising the chance of aurora borealis sightings across parts of the northern United States tonight. According to the outlook, a minor geomagnetic storm could make the colorful sky display visible in as many as 12 states.
The forecast points to geomagnetic activity increasing overnight, with the Kp index expected to reach 5 during the early hours of Wednesday. That level is often enough to push aurora visibility farther south than usual, especially in darker areas away from city lights.
Aurora displays happen when charged particles from space interact with Earth’s magnetic field and atmosphere, producing bands of green, pink, and purple light. Even during a minor storm, viewing conditions can improve quickly in northern regions if skies are clear and local light pollution is low.
While visibility can change from hour to hour, the current forecast suggests residents in northern states may have a better-than-usual opportunity to catch the northern lights tonight. As with any aurora event, cloud cover, timing, and location will play a major role in whether the display becomes visible.
