Colorado · ≈ 48.4° magnetic latitude · needs about Kp 8.9

Northern lights tonight in Colorado

Colorado sits at about 48° magnetic latitude, so the aurora reaches it from roughly Kp 8.9 — very rare: only the strongest storms, a handful of nights a decade. The card below reads NOAA's oval, tonight's dark hours, the cloud and the Moon for Pawnee National Grassland right now.

Colorado is a storm-only state: at 47–48° magnetic latitude the Front Range needs Kp 8, a G4, which happened several times in 2024–25 and made the searches. When it does come, the place to be is the north-east plains — Pawnee Grassland and Jackson Lake have a bare horizon toward Wyoming and Denver's dome 100 km behind you. Cameron Pass is darker but its northern horizon is mountains, which matters when the arc is at 4°. On a G4 night the display can reach the zenith even here and the reds dominate; on anything less, expect a low camera-only glow and set your expectations by the live number, not the headline.

Pawnee National Grassland Use your own location instead →

The oval now, pole to 40°, Colorado's meridian at the bottom. Dashed: tonight's forecast Kp.

Reading NOAA…

Pawnee National Grassland

rows: dark · oval · clear · no Moon — the window is the run of green hours

Reading NOAA…

Where to go in Colorado

Three sites a photographer would drive to, each with its measured ground darkness from the light pollution atlas and its own verdict for tonight. Coordinates are approximate: a viewpoint, a shore, a car park.

Kp now and the three nights ahead

The Kp index, with Colorado's row marked → · Storm today? →

Camera settings for this aurora

From the oval's brightness right now and the exposure law.

Plan the sequence · stack the night when you are back · the photography guide →

Other places

Sources

Aurora grid, Kp, solar wind and alerts: NOAA SWPC, read live by your browser. Cloud: MET Norway (CC BY 4.0), which receives the site's coordinates rounded to two decimals. Ground darkness: this site's atlas. Magnetic latitude from the 2025 IGRF dipole; the Kp threshold from NOAA's viewing table.