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Severe Thunderstorms in the Southeast U.S. Saturday; Flash Flooding Threat for the Northern Gulf Coast

Isolated to scattered severe thunderstorms appear possible across portions of the Southeast and Carolinas on Saturday where a Slight Risk (Level 2 of 5) has been issued. A Slight Risk Excessive Rainfall Outlook (Level 2 of 4) has been issued for part of the northern Gulf Coast Saturday due to the threat of flash, urban, and riverine flooding. Read More >

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

88°F

31°C

Humidity 70%
Wind Speed E 7 mph
Barometer 30.05 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 18 May 9:56 am AST
Extended Forecast for

2 Miles S Guaynabo PR

Heat Advisory May 18, 11:00am until May 18, 05:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Scattered showers, mainly after noon. Mostly sunny, with a high near 90. Heat index values as high as 104. East wind 7 to 13 mph. Chance of precipitation is 40%.

    High: 90 °F

    Isolated
    Showers then
    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly after 3am. Mostly clear, with a low around 77. East southeast wind around 6 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Mostly Clear
    then
    Scattered
    Showers

  • Sunday

    Sunday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 89. Heat index values as high as 102. East southeast wind 5 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 89 °F

    Scattered
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Isolated showers. Mostly clear, with a low around 78. East southeast wind around 6 mph. Chance of precipitation is 20%.

    Low: 78 °F

    Isolated
    Showers

  • Monday

    Monday: Scattered showers, mainly before noon. Mostly sunny, with a high near 90. East southeast wind 7 to 14 mph. Chance of precipitation is 30%.

    High: 90 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: Isolated showers. Mostly clear, with a low around 78. Southeast wind 5 to 7 mph. Chance of precipitation is 10%.

    Low: 78 °F

    Isolated
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. East southeast wind 7 to 14 mph.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78. East southeast wind 5 to 7 mph.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: Scattered showers, mainly after noon. Mostly sunny, with a high near 86. East southeast wind around 9 mph. Chance of precipitation is 50%.

    High: 86 °F

    Mostly Sunny
    then
    Scattered
    Showers

Detailed Forecast

Today
Scattered showers, mainly after noon. Mostly sunny, with a high near 90. Heat index values as high as 104. East wind 7 to 13 mph. Chance of precipitation is 40%.
Tonight
Scattered showers, mainly after 3am. Mostly clear, with a low around 77. East southeast wind around 6 mph. Chance of precipitation is 30%.
Sunday
Scattered showers, then showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 89. Heat index values as high as 102. East southeast wind 5 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Isolated showers. Mostly clear, with a low around 78. East southeast wind around 6 mph. Chance of precipitation is 20%.
Monday
Scattered showers, mainly before noon. Mostly sunny, with a high near 90. East southeast wind 7 to 14 mph. Chance of precipitation is 30%.
Monday Night
Isolated showers. Mostly clear, with a low around 78. Southeast wind 5 to 7 mph. Chance of precipitation is 10%.
Tuesday
Mostly sunny, with a high near 89. East southeast wind 7 to 14 mph.
Tuesday Night
Mostly clear, with a low around 78. East southeast wind 5 to 7 mph.
Wednesday
Scattered showers, mainly after noon. Mostly sunny, with a high near 86. East southeast wind around 9 mph. Chance of precipitation is 50%.
Wednesday Night
Scattered showers. Mostly cloudy, with a low around 78. Chance of precipitation is 50%.
Thursday
Showers likely. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Thursday Night
Scattered showers. Mostly cloudy, with a low around 77. Chance of precipitation is 50%.
Friday
Showers likely. Mostly cloudy, with a high near 87. Chance of precipitation is 60%.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Guaynabo PR
 18.37°N 66.11°W (Elev. 115 ft)
Last Update:
4:08 am AST May 18, 2024
Forecast Valid:
10am AST May 18, 2024-6pm AST May 24, 2024
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation