A geomagnetic storm is expected to set skies aglow in the northern part of the United States on Sunday night into early Monday morning, with the northern lights potentially visible as far south as Alabama to Northern California, according to the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center.

The geometric storm reached severe strength early Sunday morning. Though it was not expected to be as intense as the one in May 2024 that flooded skies around the world with light, Shawn Dahl, service coordinator for the Space Weather Prediction Center, said Sunday will be a great night to view the lights where skies are clear.

“Monday night would be another night to look out, especially in the more northern locations,” Mr. Dahl said. “But for those who are eager to see the aurora, where they usually don’t get to see it, the best chance would be Sunday night.”

The lights are expected to be most vivid in the northernmost states, such as Michigan and Washington State. They may also be visible on the horizon in the middle latitudes, from Oregon and Northern California across the country into the Mid-Atlantic, and down into the South.

Places with the best potential for clear skies on Sunday night include much of the Pacific Northwest, particularly earlier in the night, as well as a good chunk of Northern California.

The central Plains into the Ohio Valley, across most of the Midwest and also the Mid-Atlantic could provide good viewing opportunities.