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Northern Lights Forecast

Northern Lights Tonight in Bigfork, Montana

Live visibility odds for Bigfork, combining the current geomagnetic Kp index with real local cloud cover, not just one or the other.

Tonight's chance of seeing aurora
1%
Unlikely
LocationBigfork, Montana
Geomagnetic Forecast · NOAA / NASA
Magnetic latitude54.6°
Confirmed Kp right nowKp 1.7
Weather Forecast · NWS (US)
Clear-sky estimate41% clear skies
For entertainment purposes only, not a guarantee of visibility. Don't plan travel or spending around this number alone.

What Kp do you need in Bigfork?

Naked eye
Kp 6
Around once a month
Camera, long exposure
Kp 2.5
Most clear nights of the year
Magnetic latitude
54.6°
Not the same as the 48.1° on a map — this is what actually decides it

Those frequencies are how often the geomagnetic threshold itself is reached, before weather. Cloud cover, moonlight and local light pollution all cut into it, which is why the live score at the top of this page multiplies the geomagnetic odds by tonight's actual sky over Bigfork.

Which way to look from Bigfork

Face north. From Bigfork the auroral oval sits well to the north, so activity shows up as a glow low on the northern horizon rather than overhead — which means a clear, unobstructed northern view matters more here than total darkness does.

About aurora viewing in Bigfork

Bigfork is a small town at the northeast corner of Flathead Lake, and when the aurora appears here, it hangs low over the hills across the water, close enough that it can feel almost within reach.

Where locals actually go

The Flathead Lake shoreline right in Bigfork is the classic vantage point, with the lake providing an open, unobstructed view north without needing to drive far out of town.

Best time of year

You can't count on a Montana aurora every year, but when conditions line up, the lake's reflection makes it a distinctive show worth the wait.

Will I see the aurora in Bigfork tonight?

Right now, Bigfork has a 1% chance based on tonight's real conditions: Kp 1.7 and 41% clear skies. Unlikely. This updates live, so check back closer to dark for the most accurate read, especially if the sky is currently cloudy where you are.

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A good Kp forecast isn't the whole story. See what else actually determines whether you'll see it →

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