Live Aurora Outlook
Northern Lights in Colorado
Tonight's Live Forecast
Colorado needs a Kp index of roughly 8+ 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 Colorado tonight?
Unlikely in Colorado tonight
The Kp index is currently 0, below the roughly Kp 8 that Colorado needs for visible aurora. Watch for geomagnetic storm alerts — when Kp reaches 8+, tonight's answer changes.
Aurora in Colorado
What Colorado Needs for a Display
Colorado is a rare-event aurora state: realistically it takes a severe G4 storm (Kp 8) for visible color, which happens perhaps once or twice a year at solar maximum — the May 2024 superstorm turned skies red statewide. The good news is that when it happens, Colorado's altitude and its many certified dark-sky places (Westcliffe, Great Sand Dunes, Jackson Lake) are superb platforms. Keep an alert set for Kp 8 and treat every hit as a drop-everything night.
Below the Kp 7 view line — Colorado aurora requires severe G4 (Kp 8) storms. 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 Colorado
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 Colorado 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+) — watch for readings of 8+ to match Colorado's 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 Colorado: FAQ
Can you see the northern lights in Colorado tonight?
It depends on the live Kp index. Colorado needs roughly Kp 8 or higher for aurora to be visible from its darkest northern areas — a strong geomagnetic storm. This page compares tonight's live Kp against that threshold and gives a real-time answer, updated hourly.
What Kp index do you need to see the aurora in Colorado?
Roughly Kp 8 for a glow low on the northern horizon from the state's best locations. Below the Kp 7 view line — Colorado aurora requires severe G4 (Kp 8) storms. Southern parts of the state typically need 1–2 Kp steps more, and an overhead display needs a stronger storm than a horizon glow.
Where is the best place in Colorado to see the northern lights?
Jackson Lake State Park (Dark Sky Park, flat northern horizon); Pawnee National Grassland; Great Sand Dunes National Park. The pattern behind all of them: dark skies, a low, unobstructed view to the north, and distance from city light domes.
What time should I look for the aurora in Colorado?
Between 10 PM and 2 AM local time, centered on local midnight — when your location rotates under the densest part of the auroral oval. September through March offers the darkest skies; check the moon phase too, since a full moon washes out faint displays.
How do I get an alert when the aurora might be visible in Colorado?
Aurora visibility is driven by the Kp index, so a Kp storm alert works as an aurora heads-up. The ResonanceOne app sends free push notifications when Kp reaches geomagnetic storm level — and Colorado's threshold of roughly Kp 8 is exactly that storm territory. ResonanceOne has no aurora map; it gives you the underlying geomagnetic signal, which you pair with this page's guidance.
Elsewhere Tonight