What happened on 2026-10-19
The storm came in below the forecast. NOAA's observed planetary K index peaked at 1.0, under the forecast peak of Kp 4.3 this brief was based on.
This event is over. For the next viewing chance, check the live 72-hour forecast for your city — conditions change every few hours.
City forecast
| City | Forecast window |
|---|---|
| Narsarsuaq | Oct. 19, 20:00–23:00 UTC−1 (Kp 4.33) |
| Qaqortoq | Oct. 19, 20:00–23:00 UTC−1 (Kp 4.33) |
| Prins Christian Sund | Oct. 19, 20:00–23:00 UTC−1 (Kp 4.33) |
| Nanortalik | Oct. 19, 20:00–23:00 UTC−1 (Kp 4.33) |
The UTC forecast interval converts to a local three-hour window.
NOAA forecasts Kp 4.33 for 2026-10-19, 21:00–24:00 UTC. This is a forecast interval, not an observation.
For the listed cities, the local window is Oct. 19, 20:00–23:00 UTC−1.
What to do
- Check the live city forecast before the local window.
- Check darkness and cloud conditions again shortly before leaving.
- Use the NOAA outlook as a planning signal, not a visibility guarantee.
Sources and live checks
This brief uses NOAA’s 3-day forecast bulletin issued October 19, 2026 at 12:30 UTC. The table forecasts Kp 4.33 for October 19, 21:00–00:00 UTC; city conditions still depend on local factors.