Excessive Heat Continues today for Portions of Central and Eastern U.S.; Change in Weather Pattern this Week

Dangerous heat and humidity continues today from portions of the Plains to the East Coast. A cold front will bring lower temperatures, and potential for strong to severe thunderstorms with damaging winds and heavy rain that could produce flash flooding to the Central and Eastern U.S. through early this week. High pressure shifts West this week with building heat and monsoonal moisture.
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Hazardous Weather Conditions

Last Update: 405 PM AST Sun Jul 21 2019

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San Juan, PR Local Forecast Office

12NM SW Mayaguez PR

Marine Zone Forecast


Tonight
East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
Monday
Southeast winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Monday Night
East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tuesday
Southeast winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers through the day. Isolated thunderstorms in the afternoon.
Tuesday Night
East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Wednesday
East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Thursday
East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated thunderstorms, then scattered showers.
Friday
East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
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ABOUT THIS FORECAST

Last Update: 405 PM AST Sun Jul 21 2019
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