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October 20, 2018 Weather Forecast

October 20, 2018, 7:00 AM HST
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Photo: Chris Archer

Flood Advisory issued October 20 at 4:38AM 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

A weak trade wind flow will gradually strengthen through Sunday night. A disturbance at the upper levels of the atmosphere will lead to some unsettled weather with thunderstorms across mainly the eastern half of the island chain, but especially for the Big Island over the rest of the weekend. Locally strong trades return by Monday and persist through at least the middle of next week. Showers riding in with the trades will be favoring the windward an mountain areas. The frequency of these trade showers will increase overnight, then diminish in the morning.

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West Side

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Today: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 74. Breezy, with an east northeast wind around 15 mph, with gusts as high as 21 mph.

Sunday: Isolated showers after noon. Mostly sunny, with a high near 88. Light east wind becoming east northeast 6 to 11 mph in the afternoon. Chance of precipitation is 20%.

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South Side

Today: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. Calm wind becoming northwest 5 to 7 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: A 50 percent chance of showers and thunderstorms before 1am. Some of the storms could produce heavy rainfall. Partly cloudy, with a low around 72. North northwest wind 5 to 7 mph becoming calm in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Isolated showers after 1pm. Mostly sunny, with a high near 87. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 20%.

North Shore

Today: A 50 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 84. Breezy, with an east northeast wind 9 to 16 mph, with gusts as high as 22 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: A 50 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 72. Breezy, with an east wind 13 to 16 mph, with gusts as high as 22 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 86. Breezy, with an east northeast wind 13 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Central Maui

Today: A 50 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 86. North northeast wind 6 to 14 mph, with gusts as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Northeast wind 7 to 10 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Scattered showers. Partly sunny, with a high near 88. Breezy, with a northeast wind 8 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Upcountry

Today: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 72. Calm wind becoming west northwest 5 to 7 mph in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: A 50 percent chance of showers and thunderstorms before 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 60. West wind around 5 mph becoming calm in the evening. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday: Isolated showers after 1pm. Partly sunny, with a high near 73. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 20%.

East Maui

Today: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 79. Calm wind becoming north northeast 5 to 8 mph in the morning. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 70. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday: Showers likely and possibly a thunderstorm before noon, then scattered showers. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 81. Light east northeast wind becoming east 6 to 11 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Lanai City

Today: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 78. Breezy, with a northeast wind 8 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: Scattered showers before midnight. Partly cloudy, with a low around 68. Breezy, with a northeast wind 10 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

Sunday: Isolated showers after noon. Partly sunny, with a high near 79. Breezy, with a northeast wind 10 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

Kaunakakai

Today: A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Light east wind becoming northeast 5 to 10 mph in the morning. 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, mainly before midnight. Partly cloudy, with a low around 73. East northeast wind 8 to 13 mph. Chance of precipitation is 30%.

Sunday: Isolated showers. Mostly sunny, with a high near 85. Breezy, with a northeast wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 24 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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