Northern lights could reach New York as NOAA upgrades its storm watch to G2

A run of eruptions from the sun’s surface sent a series of coronal mass ejections toward Earth beginning September 8, 2026, and by the following day the federal agency that tracks space weather had raised its forecast. What had been a minor storm watch became a moderate one, and with that change came a wider map of where the aurora might actually be visible.

The upgrade came from the Space Weather Prediction Center, the National Oceanic and Atmospheric Administration’s dedicated forecasting arm, after multiple plasma clouds arrived close together rather than spread out over days. That clustering is what pushed the storm rating from G1 to G2 on NOAA’s five-step geomagnetic scale.

What a Watch Upgrade Actually Means

NOAA issues geomagnetic storm alerts on a scale from G1, described as minor, up to G5, described as extreme. A watch is a forecast issued before conditions arrive, based on measurements of a coronal mass ejection’s speed and magnetic orientation as it leaves the sun; a warning follows once instruments positioned between the sun and Earth confirm the disturbance has actually reached the planet’s magnetic field. Moving from a G1 to a G2 watch reflects forecasters’ judgment, built from that upstream data, that the incoming disturbance is stronger than first estimated, not a change in what has already happened.

Two Blasts Arriving Close Together

The activity traces back to an active region on the sun’s surface that spent September 8 producing a string of C-class solar flares, a mid-level category on the scale researchers use to rank flare intensity. Several of those flares carried enough force to fling plasma outward as coronal mass ejections, and forecasters tracking their trajectories determined that more than one was on a path to reach Earth within roughly a day of each other. When two or more ejections merge or arrive in close succession, their combined effect on the planet’s magnetic field tends to be stronger than either would produce alone, which is part of why the storm watch was revised upward rather than left at the original minor rating.

How Far South the Lights Could Reach

Under normal solar conditions, the aurora stays confined to high latitudes such as northern Canada, Scandinavia and Alaska. A G2 storm pushes the visible band of activity toward the mid-latitudes, and NOAA’s own outlook for this event placed the southern edge of possible visibility as far down as New York, Wisconsin and Washington state, with effects concentrated close to 55 degrees geomagnetic latitude. That is not a guarantee of a visible display in any of those places. Cloud cover, light pollution and the precise timing of the storm’s peak all affect whether a naked-eye aurora actually appears, and forecasters generally describe a G2-level chance in the northern United States as a possibility worth watching for rather than a near-certainty.

What a Moderate Storm Does to the Ground Below

Geomagnetic storms are ranked partly by their potential effects on power grids, satellites and radio communication, and a G2 sits well below the levels that have historically caused real disruption. Utilities and satellite operators routinely monitor NOAA’s alerts and can take precautionary steps at higher storm levels, but a moderate storm of this kind is not expected to knock out power or meaningfully affect most electronics. For a typical household, the practical consequence of a G2 watch is close to zero: there is no basis for it to justify unplugging appliances or changing travel plans, and the visible aurora, where it appears, is the storm’s only noticeable effect on the ground.

Events like this one have become more frequent because the sun is still working through an active stretch of its roughly eleven-year cycle, the period during which sunspot counts, flares and coronal mass ejections rise and fall in a predictable rhythm. Solar cycle 25 passed its peak in recent years, but activity during the declining phase of a cycle can remain elevated and produce clusters of eruptions like the one behind this watch, rather than tapering off smoothly. That backdrop is part of why forecasters have issued a steady run of G1 and occasional G2 watches through 2026, rather than the storm being an isolated anomaly.

What Improves the Odds of Seeing It

For anyone in the wider viewing zone hoping to catch a glimpse, the practical advice from aurora forecasters does not change much between storms: get away from city light pollution, find a spot with a clear view toward the northern horizon, and give eyes at least fifteen minutes to adjust to the dark. A phone or camera set to a longer exposure often picks up color and structure in a faint aurora that is difficult to see with the naked eye, especially at the southern edge of a G2 storm’s visibility range where the display tends to look like a pale glow rather than the vivid curtains associated with stronger storms closer to the poles. Timing also matters, since geomagnetic activity tends to peak in bursts rather than staying constant through the night.

Watching for the Next Arrival

Because coronal mass ejections take roughly one to three days to cross the distance from the sun to Earth, forecasters can typically offer several days of lead time once an eruption is detected, refining the estimate as spacecraft positioned between the two bodies take closer readings of the approaching plasma. NOAA’s Space Weather Prediction Center updates its outlooks multiple times a day during active periods like this one, and the same active region responsible for the September 8 and 9 activity remained capable of producing further flares as it continued to face Earth, meaning additional watches were possible in the days that followed.

This article was produced with the assistance of AI and reviewed by an editor.

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