Updated Northern Lights Forecast: These U.S. States May See Aurora Tonight

Update. Nov. 6, 2024: SpaceWeather.com is now calling tonight’s potential display of aurora a “low probability forecast” after NOAA and NASA models agreed that a coronal mass ejection traveling towards Earth would likely only “graze” the planet’s magnetosphere.

Where will the Northern Lights be visible tonight? The Northern Lights may be seen during the evening of Wednesday, Nov. 6, in the continental U.S. after space weather forecasters predicted favorable geomagnetic storm conditions.

It’s the result of a coronal mass ejection

It’s the result of a coronal mass ejection — a cloud of charged particles hurled in Earth’s direction from the sun — in the wake of a M3.8-class solar flare on Sunday, Nov. 3.

The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center is forecasting that a G1 geomagnetic storm will make aurora visible in clear skies from northern-tier U.S. states.

The Northern Lights will likely be brightest in Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Michigan and Maine.

The M3.8-class solar flare on Sunday, Nov. 3. NASA SDO

Where To See The Northern Lights

A G1 geomagnetic storm is being forecast, which generally means that aurora is seen from a “viewline” that could drop as far south as Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Michigan and Maine. However, in practice, it could turn out to be a stronger G2 geomagnetic storm. That would mean aurora is seen as far south as New York and Idaho.

When To See The Northern Lights

NOAA’s forecast time for the beginning of the G1 geomagnetic storm is 00-03 UTC, which translates to 7-10 p.m. EST, 6-9 p.m. CST, 5-8 p.m. MST and 4-7 p.m. PST. The predicted displays of aurora borealis have predicted Kp index of 5, which refers to the magnitude of the geomagnetic storm.

The Kp Index has a scale of 1 to 9; the higher the number, the farther south the aurora can be seen. According to NOAA, Kp 5 means “the aurora will move further from the poles, it will become brighter, and there will be more auroral activity … if you are in the right place, these aurora can be quite pleasing to look at.” In the hours after the G1 geomagnetic storm, the index slips to Kp 4.33 for three hours, then to Kp 4 for three hours, rising again to Kp 4.33 later.

NOAA’s “aurora viewline” for the evening of [+] Wednesday, Nov. 6, 2024. NOAA

Where To Check The Aurora Forecast

Space weather is unpredictable, and the forecast can change quickly. Skywatchers are advised to check NOAA’s aurora view line, which is available for tonight and tomorrow night, and its 30-minute forecast, where the latest forecasts are posted.