National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Active Weather Pattern Expected From the Midwest to the Southern Plains; Dangerous Heat Likely in Southern Texas

A strong storm system will bring numerous to widespread severe thunderstorms across portions of the Midwest and Upper Great Lakes Tuesday. Tornadoes (a few strong), damaging winds and large hail are expected. Record high temperatures will be possible over southern Texas the next several days. This may lead to dangerous heat concerns especially for areas already without power. Read More >

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

A Few Clouds

90°F

32°C

Humidity 59%
Wind Speed E 12 mph
Barometer 29.96 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 21 May 9:56 am AST
Extended Forecast for

Carolina PR

Excessive Heat Warning until May 21, 06:00pm
Click here for hazard details and duration
Excessive Heat Warning
  •  
    Excessive Heat Warning until May 21, 06:00pm

    NOW until 6:00pm Tue

    Excessive Heat Warning

  • Today

    High: 93 °F

    Isolated
    Showers then
    Showers
    Likely

  • Tonight

    Tonight: Scattered showers, mainly after 3am. Partly cloudy, with a low around 79. East southeast wind around 8 mph. Chance of precipitation is 30%.

    Low: 79 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers, then showers and possibly a thunderstorm after noon. High near 87. East wind 7 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    High: 87 °F

    Scattered
    Showers then
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 78. Light east northeast wind becoming east 9 to 14 mph in the evening. Chance of precipitation is 70%.

    Low: 78 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 87. East southeast wind 11 to 15 mph. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 79. East wind 5 to 8 mph. Chance of precipitation is 60%.

    Low: 79 °F

    Showers
    Likely

  • Friday

    Friday: Scattered showers. Partly sunny, with a high near 91. East southeast wind 6 to 13 mph. Chance of precipitation is 50%.

    High: 91 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Scattered showers. Mostly cloudy, with a low around 79. East southeast wind around 7 mph. Chance of precipitation is 50%.

    Low: 79 °F

    Scattered
    Showers

Detailed Forecast

Today
Showers likely, mainly after 3pm. Partly sunny, with a high near 93. Heat index values as high as 105. East southeast wind 13 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Tonight
Scattered showers, mainly after 3am. Partly cloudy, with a low around 79. East southeast wind around 8 mph. Chance of precipitation is 30%.
Wednesday
Scattered showers, then showers and possibly a thunderstorm after noon. High near 87. East wind 7 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 78. Light east northeast wind becoming east 9 to 14 mph in the evening. Chance of precipitation is 70%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 87. East southeast wind 11 to 15 mph. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 79. East wind 5 to 8 mph. Chance of precipitation is 60%.
Friday
Scattered showers. Partly sunny, with a high near 91. East southeast wind 6 to 13 mph. Chance of precipitation is 50%.
Friday Night
Scattered showers. Mostly cloudy, with a low around 79. East southeast wind around 7 mph. Chance of precipitation is 50%.
Saturday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 91. East wind around 6 mph. Chance of precipitation is 70%.
Saturday Night
Scattered showers. Mostly cloudy, with a low around 79. Chance of precipitation is 50%.
Sunday
Scattered showers. Partly sunny, with a high near 89. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 79.
Memorial Day
Scattered showers. Mostly sunny, with a high near 89. Chance of precipitation is 50%.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Carolina PR
 18.41°N 65.98°W (Elev. 13 ft)
Last Update:
7:13 am AST May 21, 2024
Forecast Valid:
10am AST May 21, 2024-6pm AST May 27, 2024
 
Forecast Discussion
 
Get as KML Get as XML

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