The Arctic's light show, delivered to their own backyard
Twice a year, perhaps less, the sun reminds us that Earth is not an island — that we are tethered to a star capable of flinging invisible storms across 93 million miles of space. This week, a G3 geomagnetic storm is expected to push the aurora borealis southward into Utah and the broader American West on Thursday and Friday nights, offering a rare celestial spectacle to a region that seldom receives it. It is the strongest such event of the year, a quiet echo of November's G4 storm that surprised even those who thought they knew the night sky.
- A G3 geomagnetic storm — the year's most powerful space weather event — is bearing down on Earth, with charged solar particles already en route to scramble the planet's magnetic field.
- Utah, Idaho, Wyoming, Washington, and Montana all sit within the storm's reach, creating an unusual window for aurora sightings far outside the Arctic's usual domain.
- The viewing opportunity is fleeting: Thursday and Friday nights are the prime hours, but activity is expected to fade significantly by the time Friday's sun sets.
- Northern Utah holds the best odds for naked-eye visibility, while southern parts of the state may need camera equipment to capture what the human eye alone might miss.
- Forecasters and sky-watchers are urging people to step outside and look up — this kind of invitation from the cosmos rarely arrives twice in the same season.
The sun is preparing something rare for Utah. On Thursday and Friday nights, the northern lights may appear over a state that sits too far south to see them with any regularity — the result of a G3 geomagnetic storm that the National Weather Service's Space Weather Prediction Center has been tracking closely. When solar material collides with Earth's magnetic field, it drives auroras far beyond their Arctic origins, producing the green and purple curtains of light that have captivated human observers for millennia.
This storm ranks among the strongest space weather events of the year. The last comparable display came in November, when a G4 severe storm lit up Utah's sky and caught even experienced observers off guard. This week's event is slightly less intense, but still powerful enough to matter.
The window is narrow. Thursday night offers the best conditions, with activity expected to linger well past sunset. By Friday evening, the show will likely have dimmed. Northern Utah sits in the most favorable position for naked-eye viewing, while the rest of the state falls into uncertain territory — though a camera pointed skyward may reveal what the eye alone cannot.
Idaho, Wyoming, Washington, and Montana also stand to benefit, with northern portions of those states holding strong odds. The storm's reach is wide, but its intensity will shift by location and hour. For those willing to step outside and look up, Thursday and Friday nights may deliver something most Utahns rarely witness: the Arctic's light, borrowed for a night and brought south.
The sun is about to put on a show for Utah. Sometime Thursday night or Friday night—or both—the state could see the northern lights dancing across its sky, a rare gift for a region that sits too far south to catch them often. The National Weather Service's Space Weather Prediction Center has issued a watch for a G3 geomagnetic storm, the kind of solar event that flings charged particles toward Earth and scrambles the planet's magnetic field in ways that push auroras far beyond their usual Arctic home.
When solar material from the sun collides with Earth's magnetic field, the result is the aurora borealis—curtains of green and purple light that shimmer and fold across the night sky. This particular storm ranks among the strongest space weather events the country has seen all year. It's the kind of alert that doesn't come often, and when it does, people pay attention. The last time Utah got a clear view was in November, when a G4 severe storm lit up the state's night sky in ways that surprised even seasoned observers.
The viewing window is narrow. Thursday and Friday nights are the prime hours, though the University of Alaska-Fairbanks' Geophysical Institute suggests that aurora activity could linger well past sunset on Thursday. By the time Friday's sun dips below the horizon, the show will likely have dimmed considerably. The Space Weather Prediction Center's forecast map shows northern Utah in the best position to see the lights with the naked eye. The rest of the state falls into "possible" territory—which means a camera might catch what the human eye cannot, and that's still worth the effort for anyone willing to step outside and look up.
Idaho and Wyoming sit in favorable positions too. Northern Idaho has strong odds, as do most of Washington and Montana. The storm's reach is broad, but its intensity will vary by location and time. What's certain is that this is the kind of event that doesn't wait for a second invitation. If the forecast holds, Thursday and Friday nights will offer something most people in Utah never get to see: the Arctic's light show, delivered to their own backyard.
Notable Quotes
Aurora activity could linger past sunset on Thursday, but lower activity levels are projected by Friday sunset across the West— University of Alaska-Fairbanks' Geophysical Institute
The Hearth Conversation Another angle on the story
Why does a geomagnetic storm this far south matter to Utah specifically?
Utah almost never gets to see the northern lights. They're an Arctic phenomenon. When a storm is strong enough—a G3 or G4—it pushes the auroras so far south that places like Utah, Idaho, and Montana suddenly have a chance. It's rare enough that people notice.
What's the difference between a G3 and the G4 storm from November?
The G4 in November was more severe. This one is strong but not quite at that level. Still, both are in the upper tier of what we see in a year. The G3 is nothing to dismiss.
If someone wants to see it, what are they actually looking for?
Colored light in the sky—usually green, sometimes purple or red. It moves and shifts. It's not a static thing. On a clear night with low light pollution, you might see it with your eyes. If clouds roll in or you're in a bright area, a camera with a decent exposure setting can catch it when your eyes can't.
How long will it last?
Thursday night is the main window. Friday night is possible but weaker. By Friday sunset, the activity is expected to drop noticeably. So if you're going to look, Thursday is your best bet.
What if someone misses it?
These storms don't happen on a schedule. November's was a surprise. This one was forecast. There's no guarantee when the next one will be strong enough to reach this far south. You might wait years.