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

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

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

Lat: 30.54°NLon: 91.15°WElev: 69ft.

Mostly Cloudy

95°F

35°C

Humidity 51%
Wind Speed NE 12 G 17 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index106°F (41°C)
Last update 17 Aug 12:53 pm CDT
Extended Forecast for

Old Jefferson LA

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 106. North wind around 5 mph becoming east.

    High: 96 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms, mainly between midnight and 1am. Partly cloudy, with a low around 76. Calm wind.

    Low: 76 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 109. Calm wind becoming northeast around 5 mph.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 95. Calm wind becoming northeast around 5 mph.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. Calm wind.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 95. Calm wind becoming north around 5 mph.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely after 1pm. Mostly sunny, with a high near 94. Calm wind.

    High: 94 °F

    Sunny then
    T-storms
    Likely

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 106. North wind around 5 mph becoming east.
Tonight
A 20 percent chance of showers and thunderstorms, mainly between midnight and 1am. Partly cloudy, with a low around 76. Calm wind.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 109. Calm wind becoming northeast around 5 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 76. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 95. Calm wind becoming northeast around 5 mph.
Tuesday Night
Mostly clear, with a low around 77. Calm wind.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 95. Calm wind becoming north around 5 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 76. Calm wind.
Thursday
Showers and thunderstorms likely after 1pm. Mostly sunny, with a high near 94. Calm wind.
Thursday Night
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Calm wind.
Friday
Showers and thunderstorms likely. Mostly sunny, with a high near 92. Calm wind becoming southwest around 5 mph.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Calm wind.
Saturday
Showers and thunderstorms likely. Mostly sunny, with a high near 91. Calm wind becoming northwest around 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Jefferson LA
 30.38°N 90.99°W
Last Update:
12:26 pm CDT Aug 17, 2025
Forecast Valid:
1pm CDT Aug 17, 2025-6pm CDT Aug 23, 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