Archive replay · live forecasts → CPHC
Della came within 198 km of Niihau, passing to the south-west as a tropical storm on 3 September 1957. It had peaked far out at sea at 110 kt and was weakening as it neared the islands. It pre-dates the digital forecast archive, so only the observed track survives.
Replay the track, hour by hourAt its closest, Della was 198 km (123 mi) from Niihau on 3 September 1957, as a tropical storm with 45 kt (52 mph) winds, approaching from the south-west.
No machine-readable official forecast survives for this storm. The digital forecast archive for the eastern and central Pacific begins in 1988, so the replay runs on the observed track instead.