A Flash Flood Watch is in effect for all Hawaiian island through tonight at 6:00 p.m. The National Weather Service says an extremely moist and unstable atmosphere could again spawn the development of slow-moving heavy downpours that could lead to flash flooding.
**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
Winds will be rather light for the next few days. Today could be a replay of yesterday with tropical humidity and daytime sea breezes giving way to locally heavy afternoon showers and even thundershowers. There will also be the possibility for volcanic haze over the smaller islands through the middle part of the week. More stable weather and trade winds are expected to return late in the week as the disturbance moves away from the state.
Today
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Partly sunny skies are expected in the morning with scattered windward showers. Leeward spots will be mostly sunny with mostly cloudy skies building in the afternoon. Scattered to numerous showers are expected for upslope areas as clouds build. There is a chance of thunderstorms and locally heavy rainfall as well. Winds will be light and variable up to 15 mph so our high temperatures, expected from 83° to 89°, will likely feel warmer due to the humidity.
UV index at 12 (“extreme” exposure level)
Tonight
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Variable winds are forecasted up to 15 mph. Partly cloudy skies and scattered showers are expected in windward spots. Leeward areas should gradually clear as the night goes on. Low temperatures from 73° to 78° are expected.
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