The Northern Lights may be visible in some northern U.S. states overnight on Saturday, Sept. 6 through Sunday, Sept. 7, 2025, according to the latest forecast by the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center.
As many as 14 U.S. states may see the aurora borealis in the northern night sky, most likely in the early hours of Sunday. It comes on the same day as September’s full moon, which will be seen as a total lunar eclipse or “blood moon” from some parts of the world (but not North America). A planet parade will also be visible.
The agency’s three-day forecast indicates a minor geomagnetic storm, measured at a value of up to G2 on a scale of G1 to G5. According to NOAA’s forecast, the Kp index — which provides a rough guide to the intensity of aurora displays — may reach 5.
It’s the result of a rare “sigmoid eruption” on Sept. 4, according to Spaceweather.com. A Sigmoid occurs when twisted magnetic field lines un-twist. It’s thought to have caused a potentially potent coronal mass ejection that’s moving towards Earth.
Northern Lights Tonight: Latest Forecast
“G1 (Minor) geomagnetic storming due to recurrent positive polarity coronal hole high speed stream effects is likely by late on the 05 Sep UTC day and continuing into 06 Sep,” reads a statement by NOAA, which refers to Universal Time — in North America, the geomagnetic storm is predicted for the early hours of Sunday, Sept. 7. In another update, NOAA say a coronal mass ejection is “likely to cause further G1 (Minor) storming levels with a chance for G2 (Moderate).”
Aurora Alert: Where The Northern Lights May Be Visible
NOAA’s latest aurora viewlines indicate that aurora displays are a possibility in northern U.S. states and Canada, with 15 U.S. states having a chance after dark on Friday, Sept. 5.
U.S. states that may see aurora include Alaska and (northerly parts of) Washington, Montana, Idaho, Wyoming, North Dakota, South Dakota, Minnesota, Michigan, Iowa, Wisconsin, New York, Vermont, New Hampshire and Maine.
Check NOAA’s 30-minute forecast or use apps like Glendale Aurora, My Aurora Forecast & Alerts, Hello Aurora and Aurora Alerts for the latest forecasts.
Northern Lights And The Total Lunar Eclipse
The full “Corn Moon” rises on Sunday, Sept. 7, 2025. Its presence in the night sky on Saturday may make any auroras harder to see, but that does depends on their intensity. Just a few hours before the full moon rises on Sunday in North America it will have traveled through Earth’s shadow, causing a “blood moon” total lunar eclipse visible across Australia, Asia and Africa, with Europe glimpsing the event at moonset. It’s possible auroras could be seen during the dark night skies when the full moon is in totality.
Wishing you clear skies and wide eyes.
