Update: 3:45 p.m. Tuesday

The National Weather Service has issued a flash flood watch for Oahu, Kauai and Niihau from Wednesday afternoon through late Wednesday night.

Increased rainfall and thunderstorms are possible for the western half of the island chain, forecasters said today.

Drier trade wind weather is expected to return Friday.

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While it remains sunny and breezy Monday, trade winds will weaken starting Tuesday, according to National Weather Service forecasters, while showers increase from Tuesday night through Thursday.

Thunderstorms may also be on the horizon for Wednesday and Thursday said forecasters, due to instability caused by a combination of daytime heating combined with cool air aloft.

A small craft advisory for Maalaea Bay, Pailolo and Alenuihaha channels and the leeward and southeast waters of the Big Island remains in effect through 6 a.m. Tuesday.

On Friday, one record daily maximum rainfall, and one record high temperature were recorded, surpassing previous records from decades ago.

A record daily maximum rainfall of 1.01 inches was set at Lihue, passing the previous record of 0.78 inches set in 1965. A record high of 94 degrees was set at Kahului, beating 93 set in 1951.