Borderline moderate to strong gusty trades are expected on today, with drier air across the state now that a weak front has passed through the state overnight. Trades should ease slightly on Tuesday, but breezy to locally strong trades will likely persist through rest of the week. Passing showers will ride in with the breezy trades throughout the week and will mainly be focused over windward and mauka areas, and should be most numerous at night.
Enough moisture remains for isolated to scattered light showers, where brief MVFR conditions are expected through the afternoon. Showers are primarily focused over windward and mountain areas with moderate to strong NE trade winds.
AIRMET Sierra is in effect for mountain obscuration for Kauai, Oahu, Molokai, and Maui, and for the Big Island from Upolu Point to Cape Kumukahi to South Cape, for clouds and showers above 2000 feet.
AIRMET Tango is in effect for moderate turbulence between FL210 and FL350 statewide due to an upper level disturbance. AIRMET Tango is also in effect to cover moderate turbulence downwind of terrain statewide below 8000 feet. There is also SIGMET OSCAR series for severe turbulence FL250-410 statewide.
High pressure north of Hawaii will bring fresh to strong northeast trade winds to the region today and little easing is possible through midweek. Therefore, the Small Craft Advisory (SCA) has been extended into Tuesday for the combination of winds for most waters and seas above 10 feet for areas exposed to a moderate north-northwest swell. Fresh to locally strong northeast trade winds are expected through most of the week and into the weekend.
Surf along north- and west-facing shores will remain at High Surf Advisory level conditions through this evening as the current moderate, north-northwest swell begins to slowly drop today. Offshore NDBC buoy 51101 continues to show northwest swell energy at 7 feet, 15 seconds early this morning. Surf will fall below advisory level by tonight and become small by Wednesday. Another moderate, long period northwest swell arrives Wednesday night and will likely push north and west shore surf back to advisory levels Thursday into Friday. A medium- period swell fills in on Saturday, likely prolonging moderate to large surf action into the weekend.
The current moderate, medium period south swell will continue a gradual decline through Tuesday. South shore surf will be tiny through much of the week with little southerly background energy reaching the islands. East-facing shores will see an increase in trade wind swell as strong northeast winds fill in today. Surf along east-facing shores will stay big and choppy as trades sustain through much of the week.
High Surf Advisory until 6 PM HST this evening for Kauai East- Kauai North-Kauai Southwest-Koolau Windward-Maui Central Valley North-Maui Windward West-Molokai North-Molokai Windward-Niihau- Oahu North Shore-Waianae Coast-Windward Haleakala.
Small Craft Advisory until 6 PM HST Tuesday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Big Island Windward Waters-Kaiwi Channel-Kauai Channel-Kauai Leeward Waters-Kauai Northwest Waters-Kauai Windward Waters- Maalaea Bay-Maui County Leeward Waters-Maui County Windward Waters-Oahu Leeward Waters-Oahu Windward Waters-Pailolo Channel.
