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September 12, 2018 Weather Forecast

September 12, 2018, 7:00 AM HST · Updated September 12, 7:00 AM
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Photo: Chris Archer

Flood Advisory issued September 12 at 6:37AM HST until September 12 at 9:15AM HST by NWS

Our weather team will bring you any urgent weather alerts or updates as they occur. Check our breaking news section for the latest.

**Click directly on the images below to make them larger. Charts include: Maui County high/low forecasted temperatures, projected winds, projected localized weather conditions and expected wave heights.**

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    Looking Ahead

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    Tropical Storm Olivia will move through Maui County this morning, pass south of Oahu and Kauai through this evening, then move away to the west. A low aloft north of the islands will move southwest, passing northwest of Kauai on Thursday. Instability from this low combined with moisture from Olivia will keep the weather wet through at least early Friday. A surface high will build far northeast of the state early next week and drier air will spread west across the islands over the weekend.

    West Side

    Today: Tropical storm conditions. Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall.

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    Tonight: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 77. Breezy, with a south southeast wind 13 to 18 mph becoming north northeast 6 to 11 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Thursday: Showers likely and possibly a thunderstorm before 7am, then scattered showers and thunderstorms between 7am and 1pm, then showers likely after 1pm. Some of the storms could produce heavy rainfall. Cloudy, with a high near 88. East northeast wind 7 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    South Side

    Today: Tropical storm conditions expected. A 20 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 86.

    Tonight: Scattered showers and thunderstorms, mainly between 7pm and 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 76. Breezy, with a northeast wind 6 to 11 mph becoming east 15 to 20 mph. Winds could gust as high as 28 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Thursday: Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Cloudy, with a high near 88. Breezy, with an east northeast wind 15 to 20 mph decreasing to 7 to 12 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.

    North Shore

    Today: Tropical storm conditions. Frequent showers and possibly a thunderstorm before noon, then scattered showers and thunderstorms after noon. Some of the storms could produce heavy rainfall.

    Tonight: Tropical storm conditions possible. Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 77. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Thursday: Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Steady temperature around 81. Breezy, with an east wind around 15 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Central Maui

    Today: Tropical storm conditions. Frequent showers and possibly a thunderstorm before 1pm, then scattered showers and thunderstorms after 1pm. Some of the storms could produce heavy rainfall.

    Tonight: Scattered showers and thunderstorms, then frequent showers and possibly a thunderstorm after 7pm. Some of the storms could produce heavy rainfall. Low around 76. Breezy, with an east northeast wind 16 to 21 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Thursday: Frequent showers and possibly a thunderstorm before 1pm, then showers likely. Some of the storms could produce heavy rainfall. High near 88. Breezy, with an east wind 10 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Upcountry

    Today: Tropical storm conditions expected. Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 79. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.

    Tonight: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 62. Breezy, with an east northeast wind 6 to 11 mph becoming east 16 to 21 mph after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between 1 and 2 inches possible.

    Thursday: Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 78. Light west wind. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

    East Maui

    Today: Tropical storm conditions expected. Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 86. Chance of precipitation is 80%. New rainfall amounts between 2 and 3 inches possible.

    Tonight: Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 74. Breezy, with a south southeast wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Thursday: Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 87. Breezy, with an east southeast wind 17 to 22 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Lanai City

    Today: Tropical storm conditions. Showers likely and possibly a thunderstorm before noon, then scattered showers and thunderstorms after noon. Some of the storms could produce heavy rainfall.

    Tonight: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Some of the storms could produce heavy rainfall. Cloudy, with a low around 73. Windy, with a south southeast wind 18 to 23 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Thursday: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a steady temperature around 75. East northeast wind 3 to 8 mph. Chance of precipitation is 70%. New precipitation amounts between 1 and 2 inches possible.

    Kaunakakai

    Today: Tropical storm conditions. Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall.

    Tonight: Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Cloudy, with a low around 77. Windy, with an east southeast wind 19 to 24 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 40%. New rainfall amounts between a half and three quarters of an inch possible.

    Thursday: Frequent showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 88. Breezy, with an east wind around 22 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Image: NOAA

    Image: NOAA

    Image: NOAA

    Image: NOAA

    Image: NOAA

    Image: NOAA

    Image: NOAA

    Image: NOAA

    Data Courtesy of NOAA.gov

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