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

41NM N San Juan PR

Marine Zone Forecast


Synopsis: A moderate to locally fresh easterly wind flow will hold through early this week. The next tropical wave is forecast to reach the eastern Caribbean waters between Monday and Tuesday, causing an increase in shower and thunderstorm activity over the waters.

Tonight
East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Monday
East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Monday Night
East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Tuesday
East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers in the morning, then isolated thunderstorms in the afternoon.
Tuesday Night
East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Wednesday
East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Thursday
East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers and isolated thunderstorms.
Friday
East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated thunderstorms. Scattered showers.
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ABOUT THIS FORECAST

Last Update: 405 PM AST Sun Jul 21 2019
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