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Wet Morning, Sunshine Expected Today

October 21, 2015, 1:40 AM HST
* Updated October 20, 8:42 PM
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Alerts

A High Surf Advisory is posted for the north and east facing shores of the island of Hawaii through 6 a.m. Thursday. Swell from hurricane Olaf is expected to begin impacting the area early Wednesday morning with wave heights of 6 to 10 foot faces.

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

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

Locally breezy trade winds are expected through tonight. As usual, the trades will carry showers into windward areas but leeward areas will be mostly dry. A cloud area off to the east of the state will make windward areas of the Big Island and Maui rather wet early this morning. The trade winds are forecast to weaken starting tonight and rainfall will decrease as the atmosphere dries out.

Hurricane Olaf is forecast to pass well east of the islands over the weekend. Olaf is expected to bring large surf to the islands and turn the winds out of the north, but it is too soon to know what other impacts Olaf will have. We will keep an eye on this situation and let you know if anything changes drastically.

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Two frontal bands may possibly bring some wet weather early next week.

 

Today

Today partly to mostly cloudy skies are expected with in the early morning with showers favoring windward areas. More sunshine is forecast as the day goes on. The Kona side is forecast to get clear skies in the morning with building cloud cover and scattered showers by the afternoon. High temperatures from 83° to 88°. Northeast winds are forecast around 15 mph.

UV index at 8 (“very high” exposure level)

 

Tonight

Northeast winds are expected in the evening around 15 mph. Low temperatures from 71° to 76°. Mostly cloudy skies are expected in the evening with numerous showers for windward spots. Leeward spots should see clearing 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

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