Live Aurora Outlook
Northern Lights in Idaho
Tonight's Live Forecast
Idaho needs a Kp index of roughly 5+ for visible aurora. Below is tonight's answer, computed from the live Kp reading — updated hourly, explained calmly.
Can you see the northern lights in Idaho tonight?
Close — a small uptick would put it in reach
The Kp index is currently 4, just below Idaho's approximate threshold of Kp 5. Geomagnetic activity moves in waves, so a substorm could briefly tip the odds — worth a look north if you are already somewhere dark.
Aurora in Idaho
What Idaho Needs for a Display
Idaho splits in two for aurora purposes. The northern panhandle — Sandpoint, Priest Lake, Bonners Ferry — can catch a horizon glow during a strong G1–G2 storm (Kp 5–6), helped by some of the darkest skies in the lower 48. Boise and the Snake River plain sit further south and realistically need Kp 6–7. NOAA's often-quoted Kp 6 view line passes through Idaho, which matches the split.
The northern panhandle reaches Kp 5–6 territory; NOAA's Kp 6 view line crosses the state. Aurora visibility depends on geomagnetic latitude — which differs from map latitude by up to 15 degrees — so these thresholds come from NOAA SWPC's storm-level view-line estimates, not simple map position. Treat them as odds, not guarantees: at the threshold Kp, expect a glow low on the northern horizon rather than overhead curtains.
Approximate Kp Needed by Location
Based on NOAA SWPC G-scale view-line estimates
Best Viewing Spots in Idaho
When to Look
10 PM – 2 AM local time, centered on midnight. September through March offers the darkest skies. Avoid full-moon nights and city light domes — even 30 minutes of driving makes a real difference.
Don't Refresh This Page All Winter —
get a Kp alert instead
Aurora visibility in Idaho is driven by the Kp index, so a Kp storm alert is effectively an aurora heads-up. The ResonanceOne app sends free push notifications when the Kp index reaches geomagnetic storm level (Kp 5+) — right at Idaho's visibility threshold.
To be clear: ResonanceOne is not a dedicated aurora app — no aurora map, no location-based visibility forecast. It tracks the underlying signals (Kp index, solar flares, Schumann Resonance) in one calm Activity Index, and alerts you when they spike.
Common Questions
Northern Lights in Idaho: FAQ
Elsewhere Tonight