Significant Snowfall for Washington Cascades and Northern Rocky Mountains

A cold front will linger for several days from the Pacific Northwest to portions of the northern Plains early this week. Cold temperatures and copious moisture will combine to produce several feet of snow into the mountain passes, with up to 4 feet of snow down to 4000 feet in the northern Rockies. Travel through mountain passes will be very difficult.
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Last Update: 343 PM HST Sun Dec 17 2017

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Honolulu, HI Local Forecast Office

9NM ESE Hawaiian Beaches HI

Marine Zone Forecast


Synopsis: PHZ100-181445- 343 PM HST Sun Dec 17 2017 .Synopsis for Hawaiian coastal waters... Weak low pressure will remain over the region tonight, then lift north-northeast 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. A reinforcing cold front is forecast to move across the state next weekend. $$

Tonight
Northwest winds 10 knots in the evening becoming variable less than 10 knots. Wind waves 4 feet. Northwest swell 5 feet. Haze through the night. Scattered showers in the evening. Isolated showers after midnight.
Monday
Southeast winds 10 knots. Wind waves 4 feet. Northwest swell 5 feet. Haze through the day. Isolated showers in the morning. Scattered showers in the afternoon.
Monday Night
Southeast winds 10 knots in the evening becoming variable less than 10 knots. Wind waves 4 feet. Northwest swell 5 feet. Haze through the night. Scattered showers through the night. Thunderstorms likely after midnight.
Tuesday
Winds variable less than 10 knots becoming south 10 knots in the afternoon. Wind waves 4 feet. Northwest swell 7 feet. Haze through the day. Heavy showers and thunderstorms likely in the morning. Occasional heavy showers and thunderstorms in the afternoon.
Tuesday Night
Winds variable less than 10 knots becoming south 10 knots after midnight. Wind waves 4 feet. North swell 7 feet. Haze. Showers likely and slight chance of thunderstorms.
Wednesday
West winds 10 knots. Wind waves 4 feet. North swell 6 feet. Haze. Showers likely and slight chance of thunderstorms.
Wednesday Night
Northwest winds 10 knots. Wind waves 4 feet. North swell 6 feet. Haze. Showers likely and slight chance of thunderstorms.
Thursday
North winds 15 knots. Wind waves 4 to 5 feet. North swell 6 feet. Scattered showers.
Friday
North winds 10 knots becoming variable less than 10 knots. Wind waves 3 feet. Northwest swell 6 feet. Isolated showers.
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Last Update: 343 PM HST Sun Dec 17 2017
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