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Home News Hawaii Area Forecast Hawaii Area Forecast
Hawaii Area Forecast
Area Forecast Discussion for Hawaii
Area Forecast Discussion for Hawaii

Area Forecast Discussion for Hawaii
  • Synopsis
    Moderate trades will continue as the islands remain between a high pressure system located far to the northwest, and tropical storm Oho south of the islands. A northeast to southwest band of showers over Oahu this morning is expected to sink southward, spreading showers to Maui county this afternoon and the Big Island tonight. The trade wind flow will focus most of those showers over windward and mauka areas.

  • Discussion
    A northeast to southwest band of clouds and showers is over Oahu this morning, and are the remnants of a surface trough or front. This band will continue to bring showers to Oahu this morning, with most of the showers impacting the windward side of the island. This band of showers is expected to sink southward today, and bring an increase in rain to Maui county, mainly over the windward side. Parts of this moisture band may reach down to the Big Island tonight. Have left the pops pretty much the same for Oahu today, dropped them a bit for Maui county today, and dropped more for the Big Island which is starting the day with plenty of sunshine. Showers not associated with the band could develop over the Big Island this afternoon. Have dropped the mention of thunderstorms over the Big Island today because precipitable water values are closer to normal, with 500 and 700 mb temperatures also near normal. With that combination, it will be harder to see anything develop. Oho remains south of the islands and is expected to remain to the south and then southeast of the islands over the next 36 to 48 hours. Some outer rain bands could reach the Big Island, but are not expected to cause any significant issues at this time. High pressure building north of the islands will continue to bring northeast winds to the islands for much of the week, so expect trade winds to continue, with showers focused over windward and mauka areas.

  • Aviation
    A decaying surface front currently lays across Oahu and will slowly retreat east and further dissipate. High pressure far northwest of the state will move south and tropical storm Oho to the south will move northeast through the period. The frontal band is creating widespread MVFR to periods of IFR along mountain and windward areas on Oahu. Cloud tops are generally below 080. Expect lowered conditions to stick around into the evening before improving as the front slowly tracks towards Maui county. Lowered clouds trailing the front will likely impact Kauai into the afternoon, however cigs will not be as low or as widespread as on Oahu. Expect predominately VFR with only brief MVFR cigs at PHNL, PHJR, and PHLI. Airmet sierra for mountain obsc is posted for Oahu above 015 and for Kauai above 025. From Molokai to Big Island VFR conditions will prevail through the morning. The dissipating front mentioned above will likely reach Molokai this afternoon and similar conditions described on Oahu will likely prevail on Molokai. Airmet sierra will be updated as needed.

  • Marine
    Winds and seas remain below small craft advisory levels. The current north northeast swell continues to be on the decline, and surf along the affected shorelines is beginning to drop. Another moderate north swell is expected to arrive Saturday night.

  • HFO Watches/Warnings/Advisories

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