A Storm Expected To Impact The Central U.S.

A storm system will emerge from the Rockies and impact the Central U.S. through midweek. A swath of heavy snow is expected from the Central Rockies to the Upper Mississippi Valley and Great Lakes. Locally heavy rain with a marginal chance for excessive rainfall will be possible from the Lower Mississippi Valley to the South. The system will then shift into the East to produce a number of hazards.
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Last Update: 1014 AM AST Tue Jan 22 2019

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San Juan, PR Local Forecast Office

41NM N San Juan PR

Marine Zone Forecast

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Synopsis: As a high pressure builds into the western Atlantic, the winds will increase across the local area this afternoon through Wednesday night, causing the local marine conditions to be hazardous. A cold front to the northwest of the local area is not expected to reach the local waters, but a pre-frontal trough will bring scattered showers to the local waters. Winds will slowly decrease through the weekend.

Rest Of Today
East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Northwest swell around 4 feet in the afternoon. Isolated showers.
Tonight
Northeast winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. Northwest swell 4 to 5 feet. Isolated showers.
Wednesday
East winds 15 to 20 knots. Seas 8 to 10 feet with occasional seas up to 13 feet. Dominant period 8 seconds. North swell 4 to 5 feet. Isolated showers.
Wednesday Night
East winds 15 to 20 knots. Seas 10 to 12 feet with occasional seas up to 14 feet. Dominant period 9 seconds. North swell 4 to 6 feet. Scattered showers.
Thursday
East winds 15 to 20 knots. Seas 8 to 10 feet with occasional seas up to 13 feet. Dominant period 9 seconds. North swell 4 to 5 feet. Scattered showers.
Friday
East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 10 seconds. Northeast swell 4 to 8 feet. Isolated showers.
Saturday
East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. Northeast swell 4 to 5 feet. Isolated showers.
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ABOUT THIS FORECAST

Last Update: 1014 AM AST Tue Jan 22 2019
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