HONOLULU (KHON2) - An area of high pressure that was delivering the state its trade winds continues to push to the east in front of a cold front Friday.
Meanwhile, a new high pressure system is filling in behind the old one and that's starting to takeover.
The lingering moisture from the weakened front is expected to reach Kauai by Friday evening. An upper level disturbance may bring heavy widespread showers to the islands.
There is a slight chance of passing showers Friday.
With the new high pressure system building in, the winds will begin to strengthen.
A high surf advisory is in effect for north and west facing shores. The North Shore is forecast to see up to 18-foot faces and the western shores will see 8 to 12-feet waves.
For Honolulu Marathon participants, expect some rainfall as there is a 30-percent chance of rain around 5 a.m. Sunday with winds at 25 miles per hour.