Tromsø
Best time to see the northern lights in Tromsø
When to visit Tromsø for the aurora, which hours of the night to watch, how the moon and weather change things, and how to choose a spot.
Topic
Guide
3 posts. All posts
Clouds
Clouds are the real aurora forecast
Why cloud cover decides most aurora nights, why one cloud percentage misleads, and how to use hourly forecasts and a car to find a clear sky.
Kp index
What the Kp index really tells you (and what it doesn't)
Kp is a global, three-hour measure of geomagnetic activity. Here is what it means for your aurora night, why location matters, and what it leaves out.