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

Excessive Rainfall and Severe Thunderstorms Threaten the Southern U.S. Again Friday

Heavy to excessive rainfall is forecast for eastern Louisiana into central Alabama which could bring flash, urban, and riverine flooding Friday. Scattered severe thunderstorms with a few tornadoes, very large hail, and damaging winds are possible across parts of the Gulf Coast States Friday and Friday night. 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

81°F

27°C

Humidity 84%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 May 2:56 am AST
Extended Forecast for

Loiza PR

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

  • Overnight

    Overnight: Isolated showers. Partly cloudy, with a low around 79. East southeast wind around 7 mph. Chance of precipitation is 20%.

    Low: 79 °F

    Isolated
    Showers

  • Saturday

    Saturday: Isolated showers. Mostly sunny, with a high near 91. Heat index values as high as 103. East wind 6 to 14 mph. Chance of precipitation is 20%.

    High: 91 °F

    Isolated
    Showers

  • Saturday Night

    Saturday Night: Isolated showers before 9pm, then scattered showers after midnight. Mostly clear, with a low around 79. East wind 7 to 9 mph. Chance of precipitation is 30%.

    Low: 79 °F

    Scattered
    Showers

  • Sunday

    Sunday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 90. East wind 7 to 15 mph. Chance of precipitation is 60%.

    High: 90 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Isolated showers. Partly cloudy, with a low around 79. East southeast wind around 9 mph. Chance of precipitation is 20%.

    Low: 79 °F

    Isolated
    Showers

  • Monday

    Monday: Scattered showers. Mostly sunny, with a high near 89. East wind 9 to 16 mph. Chance of precipitation is 40%.

    High: 89 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 79. East southeast wind around 10 mph.

    Low: 79 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. East wind 10 to 16 mph.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 77. East southeast wind around 10 mph.

    Low: 77 °F

    Partly Cloudy

Detailed Forecast

Overnight
Isolated showers. Partly cloudy, with a low around 79. East southeast wind around 7 mph. Chance of precipitation is 20%.
Saturday
Isolated showers. Mostly sunny, with a high near 91. Heat index values as high as 103. East wind 6 to 14 mph. Chance of precipitation is 20%.
Saturday Night
Isolated showers before 9pm, then scattered showers after midnight. Mostly clear, with a low around 79. East wind 7 to 9 mph. Chance of precipitation is 30%.
Sunday
Scattered showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 90. East wind 7 to 15 mph. Chance of precipitation is 60%.
Sunday Night
Isolated showers. Partly cloudy, with a low around 79. East southeast wind around 9 mph. Chance of precipitation is 20%.
Monday
Scattered showers. Mostly sunny, with a high near 89. East wind 9 to 16 mph. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 79. East southeast wind around 10 mph.
Tuesday
Mostly sunny, with a high near 89. East wind 10 to 16 mph.
Tuesday Night
Partly cloudy, with a low around 77. East southeast wind around 10 mph.
Wednesday
Showers likely, mainly after noon. Partly sunny, with a high near 88. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 78. Chance of precipitation is 60%.
Thursday
Showers likely. Mostly cloudy, with a high near 89. Chance of precipitation is 60%.
Thursday Night
Showers likely. Mostly cloudy, with a low around 78. Chance of precipitation is 60%.
Friday
Showers likely. Mostly cloudy, with a high near 88. Chance of precipitation is 60%.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Loiza PR
 18.42°N 65.89°W (Elev. 16 ft)
Last Update:
2:04 am AST May 18, 2024
Forecast Valid:
3am 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