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

Flooding Threat Along the Gulf Coast, Southern Rockies and High Plains; Cooler Weather in the Central and Eastern U.S.

Strong thunderstorms may bring excessive rainfall and flooding over parts of the northern Gulf Coast today and over parts of the southern Rockies into the High Plains today through the weekend. A refreshingly cool and dry air mass will continue to produce below average temperatures across the central and eastern U.S. through the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Ponce, Mercedita Airport (TJPS)

Lat: 18.02°NLon: 66.57°WElev: 26ft.

Fair

81°F

27°C

Humidity 89%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 30 Aug 10:10 pm AST
Extended Forecast for

Santa Isabel PR

  • Tonight

    Tonight: Isolated showers before midnight, then isolated showers after 3am. Partly cloudy, with a low around 75. Northeast wind around 6 mph. Chance of precipitation is 10%.

    Low: 75 °F

    Isolated
    Showers

  • Sunday

    Sunday: Isolated showers. Mostly sunny, with a high near 93. Heat index values as high as 104. Southeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    High: 93 °F

    Isolated
    Showers

  • Sunday Night

    Sunday Night: Isolated showers after midnight. Mostly clear, with a low around 76. East northeast wind around 6 mph. Chance of precipitation is 20%.

    Low: 76 °F

    Clear then
    Isolated
    Showers

  • Labor Day

    Labor Day: Isolated showers. Mostly sunny, with a high near 92. Heat index values as high as 102. Southeast wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 92 °F

    Isolated
    Showers

  • Monday Night

    Monday Night: Isolated showers. Partly cloudy, with a low around 76. East northeast wind around 7 mph. Chance of precipitation is 10%.

    Low: 76 °F

    Isolated
    Showers

  • Tuesday

    Tuesday: Isolated showers. Mostly sunny, with a high near 92. East southeast wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 10%.

    High: 92 °F

    Isolated
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 76. East northeast wind 6 to 8 mph.

    Low: 76 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Scattered showers, mainly before noon. Mostly sunny, with a high near 92. East southeast wind 8 to 11 mph. Chance of precipitation is 30%.

    High: 92 °F

    Scattered
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 76. East northeast wind 6 to 8 mph.

    Low: 76 °F

    Partly Cloudy

Detailed Forecast

Tonight
Isolated showers before midnight, then isolated showers after 3am. Partly cloudy, with a low around 75. Northeast wind around 6 mph. Chance of precipitation is 10%.
Sunday
Isolated showers. Mostly sunny, with a high near 93. Heat index values as high as 104. Southeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Sunday Night
Isolated showers after midnight. Mostly clear, with a low around 76. East northeast wind around 6 mph. Chance of precipitation is 20%.
Labor Day
Isolated showers. Mostly sunny, with a high near 92. Heat index values as high as 102. Southeast wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Monday Night
Isolated showers. Partly cloudy, with a low around 76. East northeast wind around 7 mph. Chance of precipitation is 10%.
Tuesday
Isolated showers. Mostly sunny, with a high near 92. East southeast wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 10%.
Tuesday Night
Partly cloudy, with a low around 76. East northeast wind 6 to 8 mph.
Wednesday
Scattered showers, mainly before noon. Mostly sunny, with a high near 92. East southeast wind 8 to 11 mph. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 76. East northeast wind 6 to 8 mph.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 76.
Friday
Mostly sunny, with a high near 91.
Friday Night
Partly cloudy, with a low around 76.
Saturday
Mostly sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Santa Isabel PR
 17.98°N 66.4°W (Elev. 56 ft)
Last Update:
4:02 pm AST Aug 30, 2025
Forecast Valid:
10pm AST Aug 30, 2025-6pm AST Sep 6, 2025
 
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