3-day aurora forecast
NOAA's Kp forecast, broken into 3-hour blocks for the next three days. The dashed line marks Kp 5 (G1) — the rough threshold for aurora on the northern horizon at northern-US latitudes.
data as of —
Remember Kp is a 3-hour planetary average — a useful backdrop, not a minute-by-minute promise. For the live signal, watch Bz on the dashboard. For the bigger picture beyond three days, see the 27-day outlook.