Unsettled Across the West; Increasingly Rainy with a Few Storms in the South

A frontal system will bring heavy precipitation, including mountain snowfall to much of the Pacific Northwest, northern California, and portions of the Rockies through Tuesday. Elsewhere, wet weather will return to much of the South with locally heavy rainfall; a few strong to severe thunderstorms will also be possible in this region by Tuesday.
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Last Update: 350 AM HST Mon Dec 18 2017

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Honolulu, HI Local Forecast Office

13NM ESE Waimanalo Beach HI

Marine Zone Forecast


Synopsis: PHZ100-190215- 350 AM HST Mon Dec 18 2017 .Synopsis for Hawaiian coastal waters... Weak low pressure over the region will lift north-northeast today as a cold front approaches. The cold front will reach the Kauai waters late Tuesday into Tuesday night, then continue down the island chain through midweek. Another cold front will approach the islands Thursday through Friday. $$

Today
Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 5 feet. Isolated showers through the day.
Tonight
North winds 10 knots. Wind waves 4 feet. Northwest swell 6 feet. Scattered heavy showers and thunderstorms in the evening, then heavy showers and thunderstorms likely after midnight.
Tuesday
Winds variable less than 10 knots becoming north 10 knots in the afternoon. Wind waves 4 feet. North swell 8 feet. Heavy showers likely in the morning. Thunderstorms likely through the day. Scattered showers in the afternoon.
Tuesday Night
Northeast winds 10 knots. Wind waves 4 feet. North swell 8 feet. Showers likely and slight chance of thunderstorms.
Wednesday
North winds 15 knots. Wind waves 4 feet. North swell 9 feet. Showers likely and slight chance of thunderstorms.
Wednesday Night
North winds 15 knots. Wind waves 3 feet. North swell 9 feet. Scattered showers and slight chance of thunderstorms.
Thursday
North winds 15 knots. Wind waves 3 feet. North swell 6 to 8 feet. Scattered showers.
Friday
North winds 10 knots becoming variable less than 10 knots, then becoming north 10 knots after midnight. Wind waves 3 feet. North swell 5 to 6 feet. Isolated showers.
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ABOUT THIS FORECAST

Last Update: 350 AM HST Mon Dec 18 2017
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