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Shifting Winds Expected Tonight

April 21, 2015, 1:12 AM HST
* Updated April 20, 10:17 PM
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Alerts

A High Surf Advisory is posted for the north and east facing shores of the Big Island through 6:00 a.m. Wednesday. Surf of 6 to 10 feet is expected. Expect strong breaking waves, shore break and strong longshore and rip currents making swimming difficult and dangerous.

A Small Craft Advisory is posted for all Big Island waters through 6 a.m. Tuesday for northeast winds up to to 30 knots and rough seas up to 15 feet. Inexperienced mariners should avoid navigating in these conditions.

A Gale Warning is posted through Tuesday morning at 6:00 a.m. for the ʻAlenuihāhā Channel. East winds up to 35 knots and rough seas up to 18 feet are forecasted. Mariners without the proper vessel and experience should remain in port until gale conditions end.

**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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Today

Mostly cloudy skies are expected for the Hilo side with windward showers in the morning. Kona side should get sunshine in the morning with building cloud cover in the afternoon and isolated showers. East winds are forecasted from 15 to 25 mph, gusting to 40 mph. High temperatures from 80° to 85°.

UV index at 11 (“extreme” exposure level)

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Tonight

Windward and southeastern facing slopes are expected to get numerous showers tonight. Leeward spots are forecasted to be partly cloudy. East/southeast winds are forecasted around 15 mph. Low temperatures from 69° to 74° are expected.

**Details on the Lyrid Meteor shower.**

 

Looking Ahead 

Moderate to strong trade winds are expected to weaken and become more southeasterly through mid-week and change little into the weekend. Most clouds and rain will occur over slopes facing into the wind, but showers will be more likely to drift leeward later in the week, especially at night. Southeast winds also may bring volcanic haze from Kilauea to the islands by the weekend.

 

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: UHSOEST

Image: UHSOEST

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

Image: NOAA / NWS

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