August 18, 2018 Weather Forecast

August 18, 2018, 7:00 AM HST · Updated August 18, 7:00 AM
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**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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    Light to moderate trade winds will continue through the day today, then begin to increase into the moderate to breezy category by Sunday as a weak trough of low pressure moves through from east to west. Humid and unsettled conditions associated with this trough will translate to increasing rainfall chances and potentially a few thunderstorms. Breezy and drier trade wind conditions are expected to fill in Sunday night through the early portion of next week. Although it is too early to determine how the islands will be impacted, Hurricane Lane is forecast to track through the region near the islands through the middle part of next week.

    West Side

    Today: Scattered showers. The rain could be heavy at times. Partly sunny, with a high near 90. Heat index values as high as 98. Calm wind becoming south around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Tonight: Scattered showers. The rain could be heavy at times. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Sunday: Scattered showers. The rain could be heavy at times. Partly sunny, with a high near 89. Heat index values as high as 96. Light and variable wind becoming east northeast 8 to 13 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    South Side

    Today: Isolated showers, then scattered showers and thunderstorms after 1pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 90. Heat index values as high as 97. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Tonight: Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 72. Northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Sunday: Scattered showers, mainly after 1pm. The rain could be heavy at times. Partly sunny, with a high near 89. Heat index values as high as 95. Light and variable wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    North Shore

    Today: Showers likely, mainly before noon. The rain could be heavy at times. Mostly cloudy, with a high near 89. Heat index values as high as 97. Breezy, with an east wind 14 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Tonight: Showers likely. The rain could be heavy at times. Mostly cloudy, with a low around 73. Breezy, with an east wind 13 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Sunday: Showers likely, mainly before noon. The rain could be heavy at times. Mostly cloudy, with a high near 88. Breezy, with an east wind 13 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Central Maui

    Today: Scattered showers. The rain could be heavy at times. Partly sunny, with a high near 90. Heat index values as high as 98. Breezy, with a northeast wind 9 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Tonight: Showers likely, mainly between 7pm and 1am. The rain could be heavy at times. Mostly cloudy, with a low around 71. North northeast wind 8 to 13 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Sunday: Showers likely, mainly between 7am and 1pm. The rain could be heavy at times. Partly sunny, with a high near 91. Heat index values as high as 98. Breezy, with a north northeast wind 8 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Upcountry

    Today: Scattered showers, with thunderstorms also possible after noon. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 76. Calm wind becoming west around 6 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. The rain could be heavy at times. Mostly cloudy, with a low around 59. Calm wind. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.

    Sunday: Scattered showers. The rain could be heavy at times. Partly sunny, with a high near 75. Calm wind becoming east northeast 5 to 8 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts between a quarter and half of an inch possible.

    East Maui

    Today: Frequent showers. The rain could be heavy at times. High near 84. Light and variable wind becoming east 5 to 10 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Tonight: Frequent showers. The rain could be heavy at times. Low around 70. East wind 5 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Sunday: Frequent showers. The rain could be heavy at times. High near 83. East wind 6 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Lanai City

    Today: Scattered showers. The rain could be heavy at times. Partly sunny, with a high near 79. Breezy, with a northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Tonight: Scattered showers. The rain could be heavy at times. Mostly cloudy, with a low around 69. Northeast wind 8 to 13 mph becoming light north northeast after midnight. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    Sunday: Scattered showers. The rain could be heavy at times. Partly sunny, with a high near 78. Light and variable wind becoming northeast 5 to 10 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    Kaunakakai

    Today: Scattered showers. The rain could be heavy at times. Partly sunny, with a high near 88. Heat index values as high as 97. Light and variable wind becoming east southeast 6 to 11 mph in the morning. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Tonight: Scattered showers. The rain could be heavy at times. Mostly cloudy, with a low around 74. East southeast wind 3 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Sunday: Scattered showers. The rain could be heavy at times. Mostly cloudy, with a high near 87. Light east wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    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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