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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
    A weakening front will move across Oahu later today and dissipate over Maui county on Monday. Some passing showers will accompany the front. High pressure will build in north of the area this week with trade winds becoming rather breezy. Abundant cloud coverage and occasional showers will occur over windward and mauka areas with the trade winds sufficiently strong to blow some passing showers over to some leeward locations.

  • Discussion
    A weakening frontal band is presently centered across the Kauai channel. Radar and satellite imagery shows the front is moving very slowly toward the east at the present time. Upper level support is lacking in the island vicinity so mainly light showers are accompanying the front with a few embedded moderate showers embedded along it. There are also a few passing showers seen out ahead of the front but these are rather light and isolated. The front will gradually spread over Oahu today accompanied by some passing showers. Weather should improve over most of the Kauai this afternoon. The front will then spread over Maui county tonight and Monday with mainly light showers accompanying it. It is then forecast to dissipate near Maui Monday night and Tuesday. Strong high pressure will be building in to our north in the fronts wake. Trade winds will pick up and become rather for most of this week. Leftover moisture from the dissipated front will linger across the area and over the waters to our east. Also the western end of a mid level trough will linger near the Big Island. The combination of the stronger trade winds and abundant low level moisture will cause a wet trade wind weather pattern to set up for the next few days. Windward and mauka areas will experience the greatest amount of shower activity but the trade winds will be sufficiently strong enough to blow some passing showers over to leeward areas at times. As the high moves off to the northeast and weakens later in the week, trade winds will gradually drop off just a bit with a drying trend expected as well.

  • Marine
    A new northerly swell is expected to begin arriving later today. This swell will gradually tonight and Monday with surf heights expected to reach low end advisory levels along north and east facing shorelines. This swell will linger on into Tuesday and lower gradually on Wednesday. Strengthening trade winds will keep short period choppy surf elevated along east facing shores through most of the week. Strong high pressure building in to the north will cause an increase in trade winds over the area through most of the week. Winds and seas will exceed small craft advisory thresholds across most of the area by Monday morning.

  • Aviation
    A cold front will continue to edge slowly southeastward through the island chain today, pushing through Oahu late this afternoon or early this evening and Maui county tonight. Unsettled weather can be expected as the front moves through with occasional MVFR cigs/vsbys at the terminals, with isolated IFR conditions possible. Behind the cold front winds will pick up out of the northeast as the trades kick back in. Airmet sierra is in effect for mountain obscuration on Oahu and Kauai. Conditions should improve on Kauai over the next several hours, but mountain obscuration will likely continue over Oahu through this evening. These conditions will likely spread down the island chain into Maui county tonight. Airmet tango may become necessary later today and tonight across the northern islands due to moderate low level turb as the trade winds pick up.

  • HFO Watches/Warnings/Advisories
    None.

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