What Kp does—and does not—tell you
Kp measures global geomagnetic disturbance. It is not a northern-lights visibility percentage.
A global index
Kp uses a scale from 0 to 9. Larger values indicate more disturbed geomagnetic conditions; they can be associated with aurora appearing farther from the polar regions.
Anchorage is not a single threshold
Local visibility depends on the auroral oval, timing, darkness, clouds, terrain and light pollution. There is no defensible promise that a particular Kp will put aurora overhead at your location.
Forecast resolution
The planetary Kp forecast uses three-hour intervals. Aurora Hound repeats those interval values alongside hourly clouds for planning, not as independent hourly activity predictions.
References & further reading
General educational guidance, not a live access report. Local access and conditions require current official checks.