Winter Storm Bringing Blizzard Conditions, Heavy Snow and Ice through Tonight

A sprawling winter storm will continue to produce blizzard conditions across the eastern Dakotas, western and southern Minnesota, and northern Iowa. Areas of moderate to heavy snow are expected over much of the Upper Midwest, Great Lakes, and Northeast. To the south of the snow, a wintry mix including some ice accumulations, will impact portions of the northern Mid-Atlantic with slick travel.
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Last Update: 918 PM AST Sat Jan 18 2020

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San Juan, PR Local Forecast Office

41NM N San Juan PR

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING...

Synopsis: A northerly swell and windy conditions are beginning to cause hazardous seas in the Atlantic waters, and this will spread to the rest of our local waters overnight. This is a particularly dangerous swell, with high wave heights expected and a likelihood for confused seas as well. This swell event is expected to last into the beginning of the workweek, after which conditions will drop below Small Craft Advisory criteria by Tuesday night and into Wednesday. Also, frequent passing showers with gusty winds are forecasted to move across the local and regional waters during the next several days.

Rest Of Tonight
Northeast winds 20 to 25 knots. Seas 16 to 18 feet with occasional seas up to 22 feet. Dominant period 12 seconds. North swell 8 to 13 feet. Scattered showers.
Sunday
East winds 15 to 20 knots. Seas 16 to 18 feet with occasional seas up to 22 feet. Dominant period 13 seconds. North swell 13 to 17 feet. Scattered showers through the day.
Sunday Night
East winds 15 to 20 knots. Seas 16 to 18 feet with occasional seas up to 20 feet. Dominant period 14 seconds. North swell 12 to 15 feet. Scattered showers.
Monday
East winds 15 to 20 knots. Seas 12 to 14 feet with occasional seas up to 18 feet. Dominant period 14 seconds. North swell 11 to 14 feet. Scattered showers.
Monday Night
Southeast winds 15 to 20 knots. Seas 10 to 12 feet with occasional seas up to 15 feet. Dominant period 13 seconds. North swell 8 to 12 feet. Isolated showers.
Tuesday
Southeast winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 11 seconds. East swell 4 to 9 feet. Scattered showers.
Wednesday
South winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
Thursday
North winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Scattered showers.
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ABOUT THIS FORECAST

Last Update: 918 PM AST Sat Jan 18 2020
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