A Flash Flood Watch is in effect for Oahu, Maui County and the Big Island through Saturday afternoon.
An upper level trough remains over much of the islands, bringing the potential for more heavy rain and thunderstorms through Saturday afternoon.
A drier air mass will gradually move back over the islands late Saturday into Sunday. A cold front will then approach from the northwest on Monday and slowly push southeastward through the state Monday night through Tuesday night. High pressure will then build north of the state and bring drier conditions and the long-awaited trade winds back for the latter part of next week.
Surf is expected to remain below advisory thresholds through Monday. The current small north northwest swell will subside through Saturday. Then a similar sized northwest swell is expected to peak Sunday. Small background south swells will also continue into next week.
A very large northwest swell is forecast to arrive Tuesday and peak late Tuesday night, possibly bringing warning level surf to north and west facing shores.
- Guy Hagi