Powerful Storm to Impact Eastern Third of U.S. this weekend.

A developing storm system will bring a myriad of significant impacts this weekend. Heavy snow up to 18 inches from the Ohio Valley to the Northeast, and ice up to a quarter of an inch is forecast in places. Heavy rain may cause flash flooding from the Mid-South to the Mid-Atlantic. Severe thunderstorms with damaging winds and isolated tornadoes will be possible in the Deep South.
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Last Update: 812 PM PST Fri Jan 18 2019

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Seattle, WA Local Forecast Office

6NM SW Seattle WA

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON...

Synopsis: PZZ100-191315- 812 PM PST Fri Jan 18 2019 .Synopsis for the northern and central Washington coastal and inland waters...A 975 mb low west of the Washington offshore waters will slowly fill as it moves northward toward Haida Gwaii. Its associated frontal system will move across the waters tonight. Strong pressure gradients produced by this front will give gales to most of the Washington waters with small craft advisory conditions to Puget Sound and Hood Canal and the western entrance to the Strait. Strong onshore flow behind the front on Saturday will weaken Saturday night. Weak high pressure will move across the waters Sunday and Monday. A weaker frontal system will affect the waters on Tuesday. $$

Tonight
SE wind 10 to 20 kt becoming S 20 to 30 kt after midnight. Wind waves 1 to 3 ft building to 3 to 5 ft after midnight. Rain.
Sat
SW wind 20 to 30 kt. Wind waves 3 to 5 ft. A chance of showers.
Sat Night
S wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft. A slight chance of showers.
Sun
N wind 5 to 15 kt. Wind waves 2 ft or less.
Sun Night
N wind 10 to 20 kt. Wind waves 1 to 3 ft.
Mon
N wind 10 to 20 kt becoming variable to 10 kt in the afternoon. Wind waves 1 to 3 ft subsiding to 1 ft or less in the afternoon.
Mon Night
S wind 5 to 15 kt. Wind waves 2 ft or less.
Tue
S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Wed
SW wind 10 to 20 kt becoming light. Wind waves 1 to 3 ft becoming less than 1 ft.
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ABOUT THIS FORECAST

Last Update: 812 PM PST Fri Jan 18 2019
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