A weak surface trough will gradually move east to west across the islands through tonight, resulting in light winds and land/sea breeze showers. As this trough dissipates, trades will build in stronger through Monday. Trades will be on the increase Tuesday onward.
Moderate trades will steadily increase during the day today and become locally breezy in select areas. A weak trough passing through the state will increase showers, especially over windward and mountain areas with periods of MVFR conditions expected throughout the day today. A drier airmass will move in from the east this evening, which should bring a decrease of showers tonight. One exception is over Kauai, where showery conditions are expected to persist through tonight.
AIRMET Sierra remains in effect for mountain obscuration over Kauai, Oahu, Molokai and Maui due to the passing showers.
There may be the need for AIRMET Tango for low-level turbulence as trades gradually strengthen.
A ridge will remain in place north of the islands with fresh trade winds today, strengthening Sunday and maintaining next week. A Small Craft Advisory (SCA) is posted for waters around Kauai and windward Oahu today through tonight. The typical windy waters around Maui County and Big Island will go into the SCA tonight. The SCA will likely be expanded to more areas by Sunday as winds strengthen.
A small northwest swell will maintain through the rest of the weekend, shifting out of the north to north northwest next week. Small south swell will fade this weekend with a small, long period reinforcement Monday through Thursday. Surf along east facing shores will remain below normal this weekend, but will gradually increase next week as trade winds strengthen.
Small Craft Advisory until 6 AM HST Sunday for Kauai Channel- Kauai Leeward Waters-Kauai Northwest Waters-Kauai Windward Waters-Oahu Windward Waters.
Small Craft Advisory from 6 PM this evening to 6 AM HST Sunday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters-Maalaea Bay-Pailolo Channel.
