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April 15, 2018 Weather Forecast

April 15, 2018, 6:00 AM HST (Updated April 15, 2018, 6:00 AM)
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Photo: James Grenz

High Surf Advisory issued April 15 at 3:33AM HST until April 16 at 6:00AM 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: Hawaii Island high/low forecasted temperatures, projected winds, projected localized weather conditions and expected wave heights.**

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    Looking Ahead

    The historical flooding event across Kauai continues early this morning, which includes the northern section of the island from Princeville to Haena. As of 2 AM HST, the latest rainfall summary showed the following accumulations for Hanalei over the past 24 hrs: 3-Hr (8.4″), 6-Hr (10.85″), 12-Hr (23.63″), and 24-Hr (28.15″). The previous records from 1905-present for Hanalei include: 24-Hr (12.52″), 48-Hr (24.00″), and 72-Hr (33.06″), which were all three set back in the March 2012 event.
    As of this discussion time (3 AM HST), the heavy showers and thunderstorms continue to develop over the same areas with peak rates up to 2 to 4″ per hour, which includes Hanalei. Water levels at the Hanalei River are nearing the 1995 Nov 3rd record of 15.81 ft and continue to rise (currently 14.04 ft).
    No significant changes are anticipated through the early morning hours today as a shortwave trough, currently just west of Niihau, slowly lifts northward. As a result, the flash flood watch has been extended across the state through 6 PM HST today.
    For more details on the flooding impacts on Kauai, see the latest flash flood warning or local storm reports linked on our page.

    Hilo

    Today: Frequent showers and thunderstorms before 1pm, then frequent showers and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. High near 80. East wind 3 to 7 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

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    Tonight: Frequent showers and possibly a thunderstorm before 7pm, then showers likely. Some of the storms could produce heavy rainfall. Low around 66. East wind around 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Monday: Showers likely. Cloudy, with a high near 80. East wind around 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Kona

    Today: Scattered showers and thunderstorms, mainly after noon. Some of the storms could produce heavy rainfall. Widespread haze. Mostly cloudy, with a high near 80. West wind 5 to 9 mph becoming east in the afternoon. Chance of precipitation is 50%.

    Tonight: Scattered showers before midnight. Widespread haze. Mostly cloudy, with a low around 69. Light and variable wind becoming west 5 to 7 mph after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Monday: Isolated showers after noon. Widespread haze. Partly sunny, with a high near 81. West northwest wind 5 to 8 mph becoming light and variable in the afternoon. Chance of precipitation is 20%.

    Waimea

    Today: Frequent showers and thunderstorms, mainly before 1pm, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. High near 74. Windy, with a northeast wind around 24 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    Tonight: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 57. Windy, with an east northeast wind around 26 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Monday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 74. Windy, with a northeast wind around 24 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Kohala

    Today: Showers and thunderstorms likely before noon, then showers likely and possibly a thunderstorm after noon. Some of the storms could produce heavy rainfall. Cloudy, with a high near 70. Windy, with a northeast wind around 26 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Tonight: Showers likely. Mostly cloudy, with a low around 53. Windy, with a northeast wind around 26 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Monday: Showers likely. Mostly cloudy, with a high near 70. Windy, with a northeast wind around 26 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    South Point

    Today: Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Widespread haze. Mostly cloudy, with a high near 81. Windy, with an east northeast wind 26 to 28 mph, with gusts as high as 36 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Tonight: Scattered showers. Widespread haze. Mostly cloudy, with a low around 75. Windy, with an east northeast wind around 26 mph, with gusts as high as 34 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Monday: Scattered showers, mainly before noon. Widespread haze. Partly sunny, with a high near 80. Windy, with an east wind around 25 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Puna

    Today: Frequent showers and thunderstorms before noon, then frequent showers and possibly a thunderstorm after noon. Some of the storms could produce heavy rainfall. High near 78. Northeast wind 8 to 11 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Tonight: Showers likely. Mostly cloudy, with a low around 64. Northeast wind around 11 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Monday: Showers likely. Cloudy, with a high near 78. Northeast wind 11 to 13 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Waikoloa

    Today: Scattered showers and thunderstorms, mainly after noon. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 81. Windy, with a northeast wind 24 to 26 mph becoming east southeast in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Tonight: Scattered showers before midnight. Mostly cloudy, with a low around 68. Windy, with an east southeast wind 23 to 26 mph becoming northeast after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 30%.

    Monday: Isolated showers after noon. Partly sunny, with a high near 82. Windy, with a northeast wind 23 to 26 mph becoming east southeast in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 20%.

    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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