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Increased Showers Expected Into the Weekend

July 21, 2017, 1:01 AM HST
* Updated July 20, 10:04 PM
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Image: James Grenz

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

Special Weather Statement: Coastal flooding is possible as spring tides occur. The greatest potential for that will be in the afternoon hours when the tide is expected to be the highest. This coupled with Fernanda swell could lead to higher than usual run-up. This could last through the weekend.

High Surf Advisory: East facing shores of the Big Island and Maui through 6 a.m. Friday.

Small Craft Advisory: East to northeast winds up to 25 knots through 6:00 a.m. Saturday.

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

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**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

Breezy trades are forecast through Friday, then easing over the weekend. Tropical moisture is forecast to move over the islands this weekend with higher humidity levels. The remnants of Fernanda are expected to pass just north of the islands on Monday. If that scenario holds true we expect our winds to weaken and muggy conditions.

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Today

We expect northeast winds around 15 mph. High temperatures are forecast from 82° to 87°. Partly to mostly cloudy skies with numerous scattered showers for the Hilo side in the morning and scattered afternoon showers. Partly sunny skies in the morning for Kona with isolated morning showers and scattered afternoon showers mainly for upslope areas. Areas of haze.

UV index at 12 (“extreme” exposure level)

 

Tonight 

Northeast winds are forecast around 15 mph. Mostly cloudy skies with scattered windward showers and isolated leeward showers. Shower coverage expected to increase after midnight. Low temperatures from 71° to 76°.

 

Our Big Island Now Weather homepage always includes daily: Sunrise | Sunset | Moonrise | Moonset | Moon Phase | Live Weather Cams | 5-day Forecast | Current Temperature & Conditions

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

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

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