What happened in the original forecast window
NOAA’s planetary K index was observed at 3.0 during 09:00–12:00 UTC on October 11, below this article’s original Kp 5.67 forecast for that exact interval. This is a global geomagnetic reading, not a report of visibility in any city.
City forecast
| City | Forecast window |
|---|---|
| Eagle | Oct 11, 01:00–04:00 AKDT (Kp 5.67) |
| Delta Junction | Oct 11, 01:00–04:00 AKDT (Kp 5.67) |
| Dot Lake | Oct 11, 01:00–04:00 AKDT (Kp 5.67) |
| Northway | Oct 11, 01:00–04:00 AKDT (Kp 5.67) |
| Tanacross | Oct 11, 01:00–04:00 AKDT (Kp 5.67) |
| Nenana | Oct 11, 01:00–04:00 AKDT (Kp 5.67) |
| Anderson | Oct 11, 01:00–04:00 AKDT (Kp 5.67) |
| Healy | Oct 11, 01:00–04:00 AKDT (Kp 5.67) |
The original 01:00–04:00 AKDT forecast window is now a recap.
The original NOAA forecast retrieved October 11 at 02:19 UTC placed Kp 5.67 at 09:00–12:00 UTC on October 11.
Eagle, Delta Junction, Dot Lake, Northway, Tanacross, Nenana, Anderson and Healy share the original 01:00–04:00 AKDT interval. NOAA later observed Kp 3.0 for the matching UTC interval; this is not a city visibility report.
What to do
- Check the live city forecast before the 01:00–04:00 AKDT interval.
- Check darkness and cloud conditions again shortly before leaving.
- Choose a dark viewing spot with an open northern horizon if conditions allow.
Sources and live checks
Original article figures use NOAA SWPC’s Planetary K-index forecast JSON retrieved October 11 at 02:19 UTC. NOAA’s forecast feed checked October 11 at 19:18 UTC records observed Kp 3.0 for 09:00–12:00 UTC on October 11, below the original Kp 5.67 forecast for that exact interval; this is not a city visibility report.