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A rare convergence of three coronal mass ejections has arrived at Earth, and NOAA has issued a G3 strong geomagnetic storm warning with potential G4 severe conditions continuing tonight and into Saturday morning. This is the kind of event that can push the northern lights well below their usual far-northern viewing zones, and right now, tens of millions of Americans are in the viewing zone. If you've been hoping to see the aurora, the window is still open.
NOAA’s Space Weather Prediction Center has issued a G3 strong geomagnetic storm warning, with isolated periods that could reach G4 severe levels. Translation: the northern lights may be visible much farther south than usual, with parts of 23 states across the Northeast, Midwest, and West currently in the possible viewing zone.
The forecast shows auroras could stretch across many northern states, from the Northeast through the Midwest and out toward Oregon. And if conditions sustain G4 levels, the display could push even farther south. During past severe geomagnetic storms, the northern lights have been reported as far south as Alabama and Northern California.
The reason? A pileup of solar activity. Multiple coronal mass ejections, or CMEs, left the sun on June 2. These are massive bursts of plasma and magnetic energy from the sun's surface, and in this case, three of them arrived at Earth around the same time because the fastest one caught up with the first two.
In short: the sun piled on, and that is very good news for aurora hunters.
Image Credit: NOAA Space Weather Prediction Center
NOAA rates geomagnetic storms on a scale from G1 to G5. G1 is minor, usually producing subtle aurora activity mostly at far northern latitudes. G5 is the extreme end, the kind of event that can turn skies red much farther south and keep space weather scientists talking for years. A G3 sits firmly in “maybe plan your evening around this” territory.
At G3 levels, there can be some minor effects on technology, including voltage corrections on power systems, satellite navigation issues, and low-frequency radio problems. For most travelers and skywatchers, though, the main effect is much more fun: a real chance at a more spectacular night sky than usual.
The sun entered solar maximum in 2024, the most active peak of its 11-year solar cycle, and that has helped push northern lights sightings much farther south than usual. We're still riding that wave, and this triple-CME event is one of the more notable aurora chances of the year so far.
Timing matters almost as much as location. NOAA says the best aurora viewing is usually within an hour or two of midnight, roughly between 10 p.m. and 2 a.m. local time, when activity tends to be strongest.
Location matters too. The farther you can get from city lights, the better. A dark hillside, a state park, or even a rural road with a clear view to the north will give you a much better shot than standing under a streetlight and hoping for magic.
One caveat: a bright waning gibbous moon rising after midnight could make fainter auroras harder to see. Try watching earlier in the evening if possible, and give your eyes at least 10 to 15 minutes to adjust before you give up.
Most people picture the northern lights as green, and most of the time, they are. But aurora colors depend on which atmospheric gases the charged solar particles collide with, and how high up those collisions happen.
Green comes from oxygen roughly 60 to 150 miles above Earth, which is the most common aurora-producing interaction. Red auroras happen higher up, usually above 150 miles, and tend to show up during stronger storms. Blue and purple hues come from nitrogen.
So yes, green is the classic. But if this storm reaches G4 intensity, red skies are very much on the table.
One more tip: your phone camera may pick up colors your eyes miss. Point it north, use a long-exposure or night mode setting, and you may be surprised by what shows up, even from suburban areas.
Late spring is not usually ideal for northern lights viewing, mostly because sunsets are later and the window of true darkness is shorter. But when a geomagnetic storm becomes strong enough, the aurora can still put on a serious show, sometimes even reaching as far south as Florida. This storm is the kind worth watching through tonight.
And this may not be the last surprise of the year. Solar activity is expected to stay elevated through 2026, which means more colorful geomagnetic storms could still be ahead. But the current solar maximum will not last forever. Eventually, the sun will start winding down toward its next quieter phase, and nights like this will become harder to catch.
For now, though, step outside tonight. Look north. Give your eyes a minute. The sky might have something amazing for you.
NOAA forecasts the aurora could be visible across 23 states in the Northeast, Midwest, and West, with isolated periods of G4 storm activity possible.
NOAA recommends between 10 p.m. and 2 a.m. local time as the prime window, when aurora activity is at its peak.
Three separate coronal mass ejections left the sun on June 2 and arrived at Earth on June 4, with storm effects continuing into June 5.
No. The naked eye is enough during a strong storm. A smartphone camera on night mode or long exposure will often capture more color than you can see directly.
Under G4 geomagnetic storm conditions, the northern lights have previously been seen as far south as Alabama and Northern California.
A bright waning gibbous moon rising after midnight could interfere with fainter displays, so earlier in the evening is preferable.
Possibly during a strong storm, though you'll see far more from a dark location. Move away from downtown, head to a park or elevated spot, and look north.