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.

Last Update: 917 PM PST Fri Jan 18 2019

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12NM N San Francisco CA

Marine Zone Forecast

Synopsis: PZZ500-191145- 917 PM PST Fri Jan 18 2019 .Synopsis for the Central California Coast and Bays Including the Monterey Bay...Greater Farallones...and Cordell Bank National Marine Sanctuaries... Moist air streaming through a medium upper level ridge will result in a few showers tonight. The upper level ridge will steadily move eastward Saturday allowing an upper level trough over the eastern Pacific to approach with a surface cool front with a chance of rain late in the weekend. An upper level ridge will redevelop by the middle of next week. $$

SE winds 10 kt. Chance of showers.
S winds 10 kt. Slight chance of showers in the morning.
Sat Night
S winds 10 kt. Chance of showers after midnight.
SW winds 10 to 20 kt. Showers likely in the morning, then chance of showers in the afternoon.
Sun Night
W winds 15 to 25 kt. Slight chance of showers in the evening.
Martin Luther King Jr Day
NW winds 15 to 25 kt...decreasing to 5 to 15 kt.
NW winds 5 kt.
N winds 10 kt.
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Last Update: 917 PM PST Fri Jan 18 2019
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