A few heavy showers and thunderstorms may linger through the evening across Kauai and Oahu. Trade winds are expected to build tonight becoming breezy Monday and Tuesday.
A few heavy showers and thunderstorms may linger through the evening across Kauai and Oahu as the system that brought heavy rain across much of the state begins to fade. Light and variable winds will shift easterly and strengthen tonight and Sunday, eventually becoming breezy by Monday. Scattered to broken high clouds will continue across the area through Sunday. Upper ridging over the islands will keep an active system west of the area over the next several days, but occasional high/layered clouds may come in over the western half of the state at times.
A stationary front north of the islands will dissipate with trade winds overrunning it, advancing the remnant moisture band over the islands Monday and Tuesday. Otherwise, trades will focus clouds and showers over the typical windward and mauka areas, with breezier and wetter days (Monday and Tuesday) forcing more of the showers leeward. Drier trades expected Wednesday and Thursday before winds begin to veer east southeast on Friday through next weekend ahead of a front.
Lingering clouds and showers continue to move over the smaller islands, bringing occasional MVFR conditions into tonight. The Big Island continues to have primarily VFR conditions, but the occasional shower moving overhead could bring brief MVFR conditions.
Light winds will continue through tonight, but will gradually strengthen tomorrow as the trade winds return. Showers embedded within the trade winds will bring brief MVFR conditions to windward and mauka areas.
AIRMET Sierra for mountain obscuration is in effect for Kauai, Oahu, Molokai, and Lanai. Molokai and Lanai will likely have conditions improve this evening, while Oahu and Kauai may still have overnight mountain obscuration due to lingering clouds and showers.
Slightly unstable southeasterly winds will gradually shift out of the east and strengthen tonight as thunderstorm chances diminish. Easterly trade winds will continue to increase Sunday as high pressure builds far north of Hawaii and low pressure develops far west of the islands. A Small Craft Advisory (SCA) will be needed for the typically windy waters around Big Island and Maui Sunday afternoon or evening and will likely expand to additional waters as trade winds peak in strength Monday and Tuesday. Trades will ease Wednesday and Thursday as the low to the west and high to the north weaken, though SCA conditions may persist over the typically windy waters.
Overlapping, moderate, medium period north (345-010 degrees) swells will produce surf just below the High Surf Advisory level during the peak this afternoon and evening. North swell will gradually decline Sunday through Tuesday. A similarly sized north- northeast swell is expected to arrive late Wednesday and persist through Friday, with the largest swells favoring the eastern end of the island chain.
For east facing shores, wrapping north swell will produce moderate surf along exposed coastlines through Sunday, while sheltered areas will experience small surf. Returning trade winds will produce building surf on Monday, with rough conditions above seasonal average possible Monday night into Wednesday. As trade winds over and upwind of the islands ease during the second half of the week, east shore surf will decline below average by Christmas. Surf along south facing shores will remain very small through the week.
None.
