An Arctic Outbreak; Heavy Lake Effect Snow in the Great Lakes Region

An Arctic outbreak of cold air will expand south and east from the northern Plains through the Midwest and persist into next week. Dangerously cold wind chills are expected in the Northern Plains and Upper Midwest. Heavy lake-effect snow bands and snow showers have developed downwind of the Great Lakes, and will continue into next week. Travel could be very difficult to impossible. Read More >

Hazardous Weather Conditions

Last Update: 423 AM AST Sun Dec 1 2024

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San Juan, PR Local Forecast Office

25NM WNW San Juan PR

Marine Zone Forecast


Today
East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots late this morning and afternoon. Seas 4 to 5 feet, occasionally to 6 feet. Wave detail: east 4 feet at 7 seconds and northeast 3 feet at 14 seconds. Numerous showers late this morning. Scattered showers with isolated thunderstorms early this afternoon, then isolated showers late.
Tonight
East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave detail: east 4 feet at 7 seconds and northeast 3 feet at 14 seconds. Scattered showers after midnight.
Monday
East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave detail: east 4 feet at 7 seconds and northeast 2 feet at 13 seconds. Scattered showers in the morning.
Monday Night
East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave detail: east 4 feet at 7 seconds and northeast 2 feet at 13 seconds. Scattered showers in the evening, then numerous showers after midnight.
Tuesday
East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave detail: east 4 feet at 7 seconds and north 2 feet at 8 seconds. Scattered showers.
Tuesday Night
East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave detail: east 4 feet at 7 seconds and north 2 feet at 8 seconds. Scattered showers after midnight.
Wednesday
East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers in the afternoon.
Wednesday Night
East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers.
Thursday
East winds 10 to 15 knots. Seas 5 to 6 feet, occasionally to 8 feet. Scattered showers in the afternoon.
Thursday Night
East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 5 to 6 feet, occasionally to 8 feet.

winds and seas higher in and near thunderstorms.




Winds and seas higher in and near thunderstorms.
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423 AM AST Sun Dec 1 2024
 
 

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