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Increased Showers Expected, Thunderstorms Possible

August 21, 2017, 1:54 AM HST
* Updated August 20, 7:57 AM
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Image: James Grenz

Alerts (as of 1:00 a.m.)

Special Weather Statement: Coastal flooding associated with spring tides (King tides) is occurring and expected through mid-week. The greatest potential for flooding is during the peak daily tide.

Check our breaking news section for any urgent weather alerts or updates to the weather alerts listed above.

**Click directly on the images below to make them larger. Charts include: Big Island high/low forecasted temperatures, projected winds, chance of cloud cover, projected localized weather conditions, vog/SO2 forecast and expected wave heights.**

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Looking Ahead

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Local sea breezes with afternoon clouds and showers across leeward and and interior areas will continue. Tropical moisture from the east will increase shower coverage and keep muggy conditions around through Tuesday. Instability will introduce a slight chance of thunderstorms through Tuesday. Drier and windier conditions are forecast to return Wednesday.

 

Today

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We expect east winds around 15 mph. High temperatures are forecast from 84° to 89°. Mostly cloudy skies with occasional showers for windward spots and showers likely for the Kona side. There is a slight chance of thunderstorms.

UV index at 12 (“extreme” exposure level)

 

Tonight 

East winds are forecast up to 15 mph. Mostly cloudy skies with showers likely and a slight chance of thunderstorms. Low temperatures from 72° to 77°.

 

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**Click here for your detailed Big Island surf report.**

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

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