(NEXSTAR) – Millions of Americans will have a chance to view the Northern Lights on Friday and Saturday, according to an aurora forecast from the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center.

Shawn Dahl, the service coordinator of the Space Weather Prediction Center (SWPC), had earlier hinted at the possibility of aurora visibility in a video post shared to social media. In it, Dahl said forecasters were monitoring “coronal holes” — cooler regions of the sun’s surface which allow solar wind to escape — which were rotating toward Earth.

“The one of particular note is one just rotating in from the east … and that’s going to provide potential for possibilities of G1 minor storm levels,” Dahl said.

“If you’re interested in geomagnetic storm activity, and potential for aurora viewing, that is something to watch as we go into the weekend.”

As of Thursday, the SWPC predicted no significant storm activity on Friday, and only a minor G1 storm on Saturday and Sunday. Still, the current aurora forecast predicts the Northern Lights to be visible from more than a dozen states.

A forecast shared by the SWPC on Thursday morning indicates that states including Alaska, Washington, Idaho, Montana, Wyoming, North Dakota, South Dakota, Minnesota, Iowa, Wisconsin, Michigan, New York, Vermont, New Hampshire and Maine are either partially or wholly above the “view line,” a red demarcation which estimates the southernmost point where stargazers will have a likelihood (albeit a lower one) to see the aurora.

The view line shifts north by the following day, though residents in several states still might have a chance to view the aurora in the night sky, per current SWPC predictions. (SWPC updates its maps continuously based on changing forecasts. Those hoping to view the Northern Lights can check longer-term and short-term forecasts online.)  

The SWPC also says the best time to view a possible aurora is “within an hour or two of midnight” local time, when it’s more visible to the human eye.

“There may be aurora in the evening and morning but it is usually not as active and therefore, not as visually appealing,” the agency writes.

As of Friday, space-weather conditions were not expected to produce any major radiation, geomagnetic storms, radio blackouts. An alert however, warned of possible “weak power grid fluctuations can occur” and “minor” impacts on satellite operations.