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

Severe Thunderstorms, Heavy Rain, And Flash Flooding Likely Over The Central U.S.

Strong to severe thunderstorms capable of damaging winds, large hail, and a few tornadoes will be likely this afternoon into tonight over portions of the Plains to the Midwest. Heavy rainfall will lead to flash flooding, some locally significant from Kansas to Missouri. Across the eastern U.S., much above normal temperatures can be expected. Read More >

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Mostly Cloudy

95°F

35°C

Humidity 47%
Wind Speed S 9 mph
Barometer 29.89 in (1012.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 21 Sep 1:56 pm AST
Extended Forecast for

San Juan PR

High Surf Advisory until September 22, 06:00am
Coastal Flood Advisory until September 21, 06:00pm
Click here for hazard details and duration
High Surf Advisory
Coastal Flood Advisory
  •  
    High Surf Advisory until September 22, 06:00am
    Coastal Flood Advisory until September 21, 06:00pm

    NOW: Multiple
    hazards in effect

    Click HERE for Details

  • This
    Afternoon

    This Afternoon: Isolated showers. Partly sunny, with a high near 94. Heat index values as high as 105. East wind around 6 mph. Chance of precipitation is 20%.

    Isolated
    Showers

    High: 94 °F

  • Tonight

    Tonight: Isolated showers. Partly cloudy, with a low around 79. South southeast wind 5 to 9 mph. Chance of precipitation is 10%.

    Isolated
    Showers

    Low: 79 °F

  • Sunday

    Sunday: Isolated showers, then scattered showers and thunderstorms after noon. Mostly sunny, with a high near 93. Heat index values as high as 103. East southeast wind 5 to 11 mph. Chance of precipitation is 30%.

    Scattered
    Showers

    High: 93 °F

  • Sunday
    Night

    Sunday Night: Isolated showers. Partly cloudy, with a low around 79. East wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 10%.

    Isolated
    Showers

    Low: 79 °F

  • Monday

    Monday: Isolated showers. Sunny, with a high near 92. East southeast wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 10%.

    Isolated
    Showers

    High: 92 °F

  • Monday
    Night

    Monday Night: Scattered showers. Mostly cloudy, with a low around 79. East wind around 11 mph. Chance of precipitation is 30%.

    Scattered
    Showers

    Low: 79 °F

  • Tuesday

    Tuesday: Showers likely, mainly after noon. Partly sunny, with a high near 89. South wind 8 to 11 mph. Chance of precipitation is 70%.

    Scattered
    Showers then
    Showers
    Likely

    High: 89 °F

  • Tuesday
    Night

    Tuesday Night: Showers likely. Mostly cloudy, with a low around 77. South wind 6 to 8 mph. Chance of precipitation is 70%.

    Showers
    Likely

    Low: 77 °F

Detailed Forecast

This Afternoon
Isolated showers. Partly sunny, with a high near 94. Heat index values as high as 105. East wind around 6 mph. Chance of precipitation is 20%.
Tonight
Isolated showers. Partly cloudy, with a low around 79. South southeast wind 5 to 9 mph. Chance of precipitation is 10%.
Sunday
Isolated showers, then scattered showers and thunderstorms after noon. Mostly sunny, with a high near 93. Heat index values as high as 103. East southeast wind 5 to 11 mph. Chance of precipitation is 30%.
Sunday Night
Isolated showers. Partly cloudy, with a low around 79. East wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 10%.
Monday
Isolated showers. Sunny, with a high near 92. East southeast wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 10%.
Monday Night
Scattered showers. Mostly cloudy, with a low around 79. East wind around 11 mph. Chance of precipitation is 30%.
Tuesday
Showers likely, mainly after noon. Partly sunny, with a high near 89. South wind 8 to 11 mph. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 77. South wind 6 to 8 mph. Chance of precipitation is 70%.
Wednesday
Showers likely. Mostly cloudy, with a high near 87. South southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 78. Chance of precipitation is 60%.
Thursday
Showers likely. Partly sunny, with a high near 89. Chance of precipitation is 60%.
Thursday Night
Showers likely. Mostly cloudy, with a low around 77. Chance of precipitation is 60%.
Friday
Scattered showers. Mostly sunny, with a high near 92. Chance of precipitation is 50%.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
San Juan PR
 18.41°N 66.08°W (Elev. 16 ft)
Last Update:
11:52 am AST Sep 21, 2019
Forecast Valid:
2pm AST Sep 21, 2019-6pm AST Sep 27, 2019
 
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