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NW & SW Swells Bring Waves to Big Island

October 23, 2017, 1:20 AM HST
* Updated October 22, 10:36 PM
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Image: James Grenz

Alerts (as of 1:00 a.m.)

Flash Flood Watch: Posted from Monday morning through Tuesday afternoon. Heavy showers associated with an upper trough and cold front moving down the island chain could result in flash flooding Monday through Tuesday. The latest guidance indicates the greatest potential for flooding will occur over Oahu, Maui County and Big Island.

Check our breaking news section for any urgent weather alerts or updates to the weather alerts listed above.

**Click directly on the images below to make them larger. Charts include: Big Island projected winds, tides, swell direction & period and expected wave heights.**

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Big Island Surf Forecast

Hilo side: Surf heights are expected to be double overhead today. The best breaks could get up to triple overhead.

Kona side: Surf heights are expected to be up to double overhead or more for the breaks catching the northwest. Breaks catching the southwest swell are forecast to get up to waist/shoulder high.

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South: Surf heights are expected to be up to waist/shoulder high or more.

Northeast trade swell for eastern exposures is forecast to continue fading. Our current northwest pulse is dropping today, another northwest reinforcement is expected to fill in Wednesday with a larger northwest forecast for Friday.

A fun south-southwest has filled in and is forecast to peak Monday and keep waves waist/chest/shoulder high through the middle of the week before slowly fading Thursday and into the weekend.

Keep in mind, surf heights are measured on the face of the wave from trough to crest. Heights vary from beach to beach, and at the same beach, from break to break.  

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

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

Image: NOAA

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