A surge of fast-moving solar wind heading toward Earth could create a rare sky spectacle across parts of the United States tonight. Forecasters say the incoming stream of charged particles may trigger a minor G1 geomagnetic storm, raising the possibility that the northern lights could appear across several northern states.
The phenomenon, better known as the aurora borealis, occurs when energetic particles from the sun interact with Earth’s magnetic field and atmosphere, producing glowing waves of green, pink, and purple light across the night sky.
According to forecasts from the NOAA Space Weather Prediction Center, geomagnetic activity could intensify beginning on the evening of March 13 and continuing into March 14, with slightly elevated conditions potentially lingering through the weekend.
States With the Best Chance to See the Northern Lights
Based on the current aurora view line, several U.S. states sit within the zone where the lights may become visible if skies remain clear and geomagnetic activity strengthens.
The states currently positioned within or near the forecast visibility area include Alaska, Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, Wisconsin, and Maine.
Observers in northern regions of states such as Wyoming and New York could also catch faint displays if the storm intensifies slightly beyond current predictions.
Solar Storm Activity Expected Tonight
Space weather forecasters expect the incoming solar wind stream to disturb Earth’s magnetic field enough to produce minor geomagnetic storm conditions. The storm intensity is forecast to reach a Kp index of around 4.67 on the standard nine-point scale used to measure auroral activity.
When the Kp index rises above normal levels, the aurora can push farther south than usual, allowing people in parts of the northern United States to glimpse the lights without traveling to polar regions.
Forecast models suggest the most favorable viewing window may occur during two periods of heightened geomagnetic activity: the afternoon and late evening hours in North America.
The strongest aurora activity is expected between 10 p.m. and 2 a.m. local time, when the night sky is darkest and solar wind conditions remain elevated.
Viewing Conditions Could Change Quickly
Aurora forecasting remains highly sensitive to real-time solar wind conditions, meaning the display could appear stronger than expected or fade entirely if the solar particles fail to interact with Earth’s magnetic field in the right way.
If the geomagnetic disturbance intensifies beyond current projections, the glowing curtains of light could stretch farther south across North America.
Even when activity remains modest, long exposures from smartphone cameras can often reveal faint auroral glows that may be difficult to detect with the naked eye.
With the spring equinox approaching on March 20, conditions for aurora formation often become slightly more favorable due to seasonal changes in the alignment between Earth’s magnetic field and the solar wind.
For skywatchers across northern parts of the United States, tonight could provide a rare opportunity to look up and witness one of nature’s most mesmerizing space weather displays.
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