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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Hazardous Weather Conditions

Current conditions at

Baton Rouge, Baton Rouge Metropolitan, Ryan Field (KBTR)

Lat: 30.54°NLon: 91.15°WElev: 69ft.

Thunderstorm in Vicinity

78°F

26°C

Humidity 87%
Wind Speed W 6 mph
Barometer 30.13 in (1020.1 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 15 Aug 3:53 pm CDT
Extended Forecast for

Port Allen LA

Heat Advisory August 16, 10:00am until August 16, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms. Cloudy, with a steady temperature around 76. South wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 109. Calm wind becoming north around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 77. Calm wind. Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny and hot, with a high near 96. Calm wind becoming north around 5 mph in the morning. Chance of precipitation is 60%.

    High: 96 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 77. Calm wind. Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 96. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 95. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 95 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Cloudy, with a steady temperature around 76. South wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 76. Calm wind.
Saturday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 109. Calm wind becoming north around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 77. Calm wind. Chance of precipitation is 20%.
Sunday
A slight chance of showers, then showers and thunderstorms likely after 10am. Mostly sunny and hot, with a high near 96. Calm wind becoming north around 5 mph in the morning. Chance of precipitation is 60%.
Sunday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 77. Calm wind. Chance of precipitation is 20%.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 96. Calm wind becoming northeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm.
Tuesday
A chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 95. Calm wind becoming northeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm.
Wednesday
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 96. Calm wind becoming north around 5 mph.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 76. South wind around 5 mph becoming calm.
Thursday
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95. Calm wind becoming northwest around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Southwest wind around 5 mph becoming calm.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Calm wind becoming west around 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Port Allen LA
 30.45°N 91.2°W
Last Update:
4:27 pm CDT Aug 15, 2025
Forecast Valid:
4pm CDT Aug 15, 2025-6pm CDT Aug 22, 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