Heavy Rain / Thunderstorms Possible Today

July 22, 2015, 1:45 AM HST

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Alerts

A High Surf Advisory is posted for east facing shores through 6:00 p.m. Wednesday. Surf heights of 5 to 8 feet are expected. 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.**

SWIPE LEFT OR RIGHT

Today

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We expect high temperatures from 84° to 89°. East winds are expected around 15 mph. Mostly cloudy skies are forecasted for windward areas with scattered showers. For leeward areas and we expect a mostly clear morning and afternoon clouds with scattered showers and the possibility of thunderstorms in the afternoon. Locally heavy rainfall is possible. Hazy skies are expected for much of the Big Island (see UHSOEST model above).

UV index at 13 (“extreme” exposure level)

Tonight

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For leeward areas, partly cloudy skies are expected tonight with clearing as the night goes on. Windward spots are partly cloudy with scattered showers. Variable winds are forecasted from 5 to 15 mph. Low temperatures from 72° to 77° are expected.

Looking Ahead

Light-east southeast flow will continue through the day Thursday. A somewhat unstable airmass along with sufficient moisture at the surface will likely result in some moderate to heavy showers at times through Wednesday. Trade winds will briefly strengthen from Thursday night through Friday night. An increase in showers and humidity is expected this weekend as remnant moisture from a former tropical cyclone moves across Hawaii this weekend.

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