Weather

October 20, 2018 Weather Forecast

October 20, 2018, 1:45 PM HST
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Photo: James Grenz

High Surf Advisory issued October 20 at 3:32AM HST until October 22 at 6:00PM 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

Trade winds will gradually strengthen through Sunday night. An upper trough across the main island chain may trigger thunderstorms and bouts of heavy rainfall across Maui County and the Big Island through today and possibly Sunday. Expect locally strong trades to return by Monday and persist through the middle of next week. Showers riding in on the trades will favor windward and mountain areas. Shower frequency will increase overnight, then diminish in the morning.

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Hilo

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This Afternoon: Showers likely and possibly a thunderstorm. Cloudy, with a high near 84. North northeast wind around 7 mph. 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 69. West northwest wind 3 to 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 85. Calm wind becoming north northeast 5 to 9 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

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Kona

This Afternoon: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82. West wind 3 to 7 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: A 40 percent chance of showers and thunderstorms, mainly before midnight. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 67. Light and variable wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: A slight chance of showers and thunderstorms, then scattered showers after noon. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 83. Calm wind becoming southwest 5 to 7 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Waimea

This Afternoon: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Breezy, with a northeast wind around 16 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Tonight: Showers likely and possibly a thunderstorm before midnight, then scattered showers and thunderstorms after midnight. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 58. Breezy, with an east northeast wind 13 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Sunday: Scattered showers and thunderstorms. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 79. Breezy, with a northeast wind 13 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

Kohala

This Afternoon: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 70. East northeast wind 8 to 13 mph. 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. Mostly cloudy, with a low around 52. Breezy, with an east northeast wind around 15 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 71. Breezy, with an east northeast wind around 18 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

South Point

This Afternoon: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84. Breezy, with an east northeast wind 15 to 17 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 40 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 73. Breezy, with an east northeast wind 17 to 21 mph, with gusts as high as 26 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 85. Breezy, with an east northeast wind 16 to 20 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Puna

This Afternoon: Showers likely and possibly a thunderstorm. Cloudy, with a high near 81. North northeast wind 11 to 13 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 and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Cloudy, with a low around 66. North wind 7 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Sunday: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 82. North northeast wind 7 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

Waikoloa

This Afternoon: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Breezy, with a northeast wind 9 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: A 30 percent chance of showers and thunderstorms before midnight. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 67. Breezy, with an east wind 10 to 17 mph, with gusts as high as 24 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Scattered showers after noon. Partly sunny, with a high near 85. Breezy, with a northeast wind 15 to 20 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 30%. 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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