Vigorous System Impacting the Northwest; Large System To Affect East

A potent storm system is delivering heavy rainfall, strong winds, rough surf and beach erosion along the Pacific Northwest coast with mountain snow inland. Expect a couple more systems to arrive late week into the weekend. Meanwhile, another developing large scale system will deliver a heavy rain and renewed flood threat to much of the East late Wednesday through Friday, which may impact travel.
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Last Update: 858 PM HST Tue Dec 18 2018

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Honolulu, HI Local Forecast Office

14NM NE Kahuku HI

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY THURSDAY

Synopsis: PHZ100-191915- 858 PM HST Tue Dec 18 2018 .Synopsis for Hawaiian coastal waters... A cold front will continue southeastward down the island chain tonight, then stall and dissipate in the vicinity of the Big Island Wednesday and Wednesday night. Strong north-northeasterly winds will build in along and behind the front, then transition to a more typical east-northeasterly direction late Wednesday and Wednesday night. Additionally, a large northwest swell will peak tonight, with combined seas reaching 10 feet or more in many areas, with hazardous seas continuing to affect the marine area Wednesday night and possibly into the day Thursday. High pressure will build north of the state Thursday through the weekend, keeping moderate to locally strong trade winds in place. $$

Rest Of Tonight
Northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 13 feet. Scattered showers.
Wednesday
Northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 12 feet. Scattered showers in the morning.
Wednesday Night
Northeast winds 20 knots. Wind waves 6 feet. Northwest swell 10 feet.
Thursday
East winds 20 knots. Wind waves 5 feet. North swell 8 feet.
Thursday Night
East winds 20 knots. Wind waves 6 feet. Northwest swell 7 feet. Isolated showers after midnight.
Friday
East winds 15 knots. Wind waves 5 feet. North swell 6 feet. Isolated showers in the morning.
Friday Night
East winds 15 knots. Wind waves 5 feet. Northwest swell 6 feet. Isolated showers after midnight.
Saturday
East winds 20 knots. Wind waves 5 to 6 feet. Northwest swell 5 feet. Isolated showers.
Sunday
East winds 20 knots. Wind waves 6 to 7 feet. Northwest swell 5 feet. Scattered showers.
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ABOUT THIS FORECAST

Last Update: 858 PM HST Tue Dec 18 2018
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