Current Aurora Visibility and KP Index
The aurora is visible tonight primarily within the auroral oval, a ring-shaped zone around the magnetic poles where solar wind particles interact with the upper atmosphere. The visibility depends on the planetary K-index (KP), a scale from 0 to 9 measuring geomagnetic activity. A KP of 5 or higher typically expands the oval southward, making the aurora visible at lower latitudes than usual. The National Oceanic and Atmospheric Administration (NOAA) provides real-time KP forecasts and aurora alerts through its Space Weather Prediction Center, which updates conditions every few minutes based on solar wind data from satellites like DSCOVR and ACE.
Tonight's aurora visibility is influenced by coronal mass ejections (CMEs) and solar wind streams from coronal holes. When a CME hits Earth, it can spike the KP index rapidly, triggering G1 to G4 geomagnetic storms. During a G3 storm, the aurora may be seen as far south as the northern United States, southern Europe, and central Asia. The European Space Agency's Space Weather Service and the British Geological Survey both publish real-time aurora maps that show the predicted oval position for tonight, helping viewers identify if their location falls under the active zone.
Best Locations to See the Aurora Tonight
For observers in the Northern Hemisphere, the best locations to see the aurora tonight include northern Scandinavia, Iceland, northern Canada, Alaska, and the northern tier of the contiguous United States. In Scandinavia, Tromsø in Norway, Abisko in Sweden, and Finnish Lapland are consistently ranked among the top destinations due to their position under the auroral oval and high probability of clear skies during winter months. Iceland's northern and inland regions also offer frequent sightings when geomagnetic activity is moderate to high.
In North America, Fairbanks, Alaska, and Yellowknife, Canada, sit directly under the oval and provide some of the highest odds of aurora visibility. In the contiguous U.S., states like Montana, North Dakota, Minnesota, Michigan, and Maine can see the aurora when the KP index reaches 6 or above. The University of Alaska Fairbanks Geophysical Institute publishes a daily aurora forecast map that highlights the three-day outlook and the specific latitude bands where the aurora is most likely visible tonight.
Aurora Forecast Tools and Real-Time Data Sources
Several reliable tools provide real-time aurora forecasts and visibility predictions for tonight. NOAA's OVATION Prime model generates a 30-minute forecast map showing the aurora's equatorward boundary based on solar wind conditions measured by the DSCOVR satellite at the L1 Lagrange point. The model uses data from the National Weather Service and is updated every few minutes, giving viewers a near-real-time view of where the aurora is currently visible.
For mobile access, the NOAA Space Weather Prediction Center app and third-party apps like My Aurora Forecast and Aurora Watch use the same underlying data to send push notifications when the KP index rises above a user-defined threshold. These tools integrate data from the European Space Agency's Space Weather Service and the Canadian Space Agency's geomagnetic monitoring network. The NOAA forecast model is widely used by airlines, power grid operators, and satellite companies to assess geomagnetic risk, and its public-facing aurora maps are updated continuously to reflect the latest solar wind measurements.