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Threat for Locally Heavy Rainfall Through Weekend

November 21, 2015, 1:31 AM HST
* Updated November 21, 8:03 AM
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Alerts

A Flash Flood Watch is in effect through late tonight for tropical moisture interacting with a surface low near Kauai that could increase the threat for rain and possibly lead to flooding. the chances are higher for the western half of the state.

Check our breaking news section for any urgent weather alerts.

**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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Showers and localized heavy rain will continue through Sunday as tropical moisture interacts with a frontal boundary northwest of Kauai. The unsettled weather conditions may continue on Monday and Tuesday, along with periods of volcanic haze affecting the smaller islands at times. The low is expected to migrate north on Sunday but keeping a trailing rain band right across the smaller islands through early next week. Models currently show this band stalling over the central portions of the island chain on Sunday, bringing more clouds and showers before moving further east and into the Big Island Monday and Tuesday. A more typical trade wind pattern is expected to return by Tuesday night and into Wednesday.

 

Today & Sunday

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Today scattered showers are expected for the Big Island. Locally heavy rainfall is possible with areas of haze. High temperatures from 82° to 87°. South to southeast winds are forecast around 5 to 15 mph.

UV index at 7 (“high” exposure level)

 

Tonight & Sunday Night

South to southeast winds are expected in the evening from 5 to 15 mph. Low temperatures from 73° to 78°. Mostly cloudy skies are expected in the evening with showers likely for windward spots. Leeward spots should be cloudy with scattered showers.

 

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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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