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Afternoon Downpours Expected to Continue

September 18, 2015, 1:54 AM HST
* Updated September 17, 9:57 PM
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Alerts

A Small Craft Advisory is posted for the ʻAlenuihāhā channel as well as waters to the west and south of the Big Island through 6 a.m. Saturday. Northeast to east winds up to 25 knots are expected along with seas up to 10 feet.

A High Surf Advisory is posted for south facing shores through 6 p.m. Friday for wave heights up to 6 to 8 foot faces. The swell is expected to build Thursday night and peak Friday. Expect strong breaking waves, shore break and strong longshore and rip currents making swimming difficult and dangerous.

**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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Trade winds are expected to continue through the weekend and into next week. Brief passing showers will ride on our winds and push into windward coasts and slopes over the next couple of days, with no major moisture sources expected. A disturbance high in the atmosphere will continue to support the development of locally heavy showers over leeward Big Island the next couple of afternoons, but is otherwise expected to have little effect on island weather through the weekend. Increased moisture is expected to fuel a greater number of windward showers early next week.

 

Today 

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Today we expect mostly cloudy skies for windward Big Island in the morning with showers likely and partly cloudy skies and scattered showers in the afternoon. The Kona side will be clear to start and mostly cloudy with showers likely each afternoon. Some of those showers may be heavy. High temperatures from 84° to 89°. Northeast winds are expected from 10 to 20 mph.

UV index at 11 (“extreme” exposure level)

 

Tonight 

Northeast winds are expected this evening from 10 to 20 mph. Low temperatures from 73° to 78°. Mostly cloudy skies are expected in the evening with scattered showers for windward spots. Leeward spots should get scattered showers in the evening with a clearing trend as the night goes on.

 

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 / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

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