Aurora Borealis in Forest Lake
United States · 45.28°, -92.99° · geomagnetic 53.9° · needs Kp 7
Tonight's aurora forecast for Forest Lake
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. Forest Lake needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.7. Short of the threshold, which is what most nights look like here.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:36 UTC
Local aurora guide for Forest Lake
Forest Lake generally needs planetary Kp 7 before the aurora borealis reaches the local sky. Historical Kp and darkness data produce about 3.2 viable nights a year across 10.0 years of records.
The strongest historical overlap of darkness and activity occurs in May, September and August.
The central sky is approximately Bortle 7. The supplied darker-sky reference is 25 km north at Bortle 5.
Aurorasaurus recorded 178 verified reports within 300 km of Forest Lake between 2015-01-01 and 2016-12-31. These records describe past observations, not tonight's prediction.
Sources: Revon analysis of NOAA planetary Kp · Solar declination and hour-angle calculation · Falchi 2016 World Atlas of artificial night sky brightness · Aurorasaurus verified positive reports
Know when it is worth going outside
Revon watches the Forest Lake forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Nearby towns
Forecasts for places within reach of Forest Lake.