Northern Lights tonight in Trondheim

Tonight in Trondheim

Trondheim sits at a geomagnetic latitude of 63.0° N, so the aurora usually needs a Kp index of about 1 or higher before it rises above the northern horizon. Tonight's NOAA forecast peaks at Kp 3 (quiet) during the dark hours, which is enough for Trondheim.

Open-Meteo expects about 92% cloud cover on average between 8 pm and 6 am local time, with no mostly clear hours.

The Moon is 100% illuminated (full moon), bright enough to wash out a faint aurora, so only a stronger display will stand out. For the best view look north and overhead, from somewhere away from street lights.

Right now NOAA's OVATION model gives up to 13% chance of aurora in the part of the sky visible from Trondheim. OVATION is a short-range nowcast (30 to 90 minutes ahead), useful for deciding whether to step outside now.

3-day Kp forecast

3 of the next 3 days reach the Kp 1 that Trondheim needs. Kp is a global 0–9 index of geomagnetic activity, issued in 3-hour blocks (UTC); NOAA forecasts beyond 24 hours are uncertain, because storms are triggered by solar eruptions that take 1–3 days to arrive.

Why Trondheim needs Kp 1

The aurora forms in an oval around the geomagnetic pole, which sits in the Canadian Arctic (about 80.8° N, 72.8° W), not at the geographic pole. That is why the Kp a city needs depends on its geomagnetic rather than its geographic latitude. At Kp 0 the oval's edge is near 66° geomagnetic; each step of Kp pushes it roughly 2° toward the equator.

At 63.0° geomagnetic, Trondheim needs about Kp 1 for aurora low on the horizon, Kp 3 or more for a display high in the sky.

Aurora forecast for nearby cities

• Northern lights Oslo
• Northern lights Drammen
• Northern lights Bergen
• Northern lights Moss
• Northern lights Umeå
• Northern lights Örebro
• Northern lights Västerås
• Northern lights Uppsala

More sky and weather

• Aurora forecast (all cities)
• Northern Taurids meteor shower
• Meteor showers
• Wildfires near Trondheim
• Weather warnings