The National Weather Service has issued a flash flood watch for all Hawaiian islands, which goes into effect from 6 p.m. today through 6 a.m. Saturday.

Forecasters are expecting a disturbance to move in from the west, which combined with another one moving in from the east, is expected to bring the potential for locally heavy rains and thunderstorms statewide during that time period.

The isles covered include Niihau, Kauai, Oahu, Maui, Molokai, Lanai, Kahoolawe and Hawaii island.

A flash flood watch means conditions are favorable for flash flooding, and everyone should be prepared to take action if one is issued.

Surf on north shores lowers from 3 to 5 feet today to 1 to 3 feet today.

Surf on east shores remains at 2 to 4 feet, while surf on south and west shores remains at 1 to 3 feet today.