Limited showers windward and mauka into next week as moderate trades become breezy tonight into Sunday night. More widespread rain develops over the western end of the state by Wednesday. Periods of heavy rain will be possible over and around Kauai and potentially Oahu during the second half of the week.
Moderate trades through the period. Windward and mauka SHRA possible. MVFR conds in SHRA otherwise VFR prevails.
AIRMET Sierra is in effect for mtn obsc for windward Big Island. Conds should improve in the mid morning hours.
Moderate to locally fresh trade winds will build in this evening as the high pressure strengthens to the north. A Small Craft Advisory goes into effect this evening for the windier waters and channels around Maui County and the Big Island through Sunday afternoon and may need to be extended. Locally strong trades may persist into early next week before high pressure to the north weakens again and winds start to diminish. By the middle of next week, troughing developing northwest of the islands may cause winds to veer out of the southeast once again.
Surf along south-facing shores will steadily decline through the weekend. A new small, long-period south swell, originating from a large fetch of gale force winds southeast of New Zealand earlier this week, is expected to slowly fill in Sunday evening and peak Monday through Wednesday. This will push surf to slightly above seasonal averages for the first half of next week.
A small bump in surf along north-facing shores will fade tonight. Another small bump in north shore surf is possible early next week as a small, medium-period northwest swell arrives late Sunday and peaks on Monday. This will be followed by a slightly larger long-period northwest swell peaking on Wednesday, giving a good boost to north shore surf for mid-week. Surf along east-facing shores will increase and become more choppy tonight as easterly trades build back into the region.
Small Craft Advisory until 6 PM HST Sunday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Maalaea Bay-Pailolo Channel.
