Flash Flood Warning for the island of Kauai until 7:15 a.m. That warning could be extended and/or expanded.
The wet and unstable weather on Kauai is due to a weak surface trough interacting with an unstable air mass. The unsettled weather will move eastward across the state over the next 24-36 hours. Later today, Oahu and Maui County will likely see heavy rainfall, thunderstorms and perhaps flooding. Then the Big Island will get the wet weather overnight and Saturday.
A drier air mass will gradually move back over the islands 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.