A High Surf Warning is posted for east facing shores of the Big Island through 6 p.m. Thursday with wave heights rising to 12 to 18 foot faces in some spots Tuesday. Expect ocean water occasionally sweeping across portions of beaches, very strong breaking waves and strong longshore and rip currents. Breaking waves may occasionally impact harbors making navigating the harbor channel difficult. Large breaking surf, significant shore break and dangerous currents will make entering the water very hazardous. Boaters should be aware of an increased number of surfers in the water.
A Small Craft Advisory is posted for Big Island windward and southeastern waters as well as Alenuihaha channel through 6 p.m. Thursday for rough seas up to 12 feet. Inexperienced mariners should avoid navigating in these conditions.
**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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SWIPE LEFT OR RIGHT
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Looking Ahead
Muggy conditions and showery weather are expected over the next several days, especially in the afternoon hours. Rainfall associated with the outer circulation of Ignacio were moving across the leeward waters of the Big Island and the Alenuihaha channel. Passing showers were also observed over Maui county.
Overall, the winds will keep changing as Ignacio moves further away from the area during the next couple of days. This will bring periods of SW or S winds colliding with the mountains, which could result in some localized heavy rain at times. The weak winds will also allow for very humid conditions to continue with above normal temperatures and potential for heat index values in the upper 90s.
Humid conditions and showery weather is forecasted through the weekend. A decrease in the chance of heavy rain is expected after Thursday when the air mass starts to dry out some. The extended forecast will depend heavily on the track of hurricane Jimena, which should remain well to the northeast of the islands.
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Today
Today we expect partly to mostly cloudy skies showers likely in the afternoon. Locally heavy rainfall is possible. High temperatures from 86° to 91°. Variable winds from 10 to 15 mph.
UV index at 12 (“extreme” exposure level)
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Tonight
Variable winds are expected this evening up to 15 mph. Low temperatures from 73° to 78°. Partly to mostly cloudy skies are expected with showers likely and locally heavy rainfall possible.
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