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Baton Rouge, Louisiana
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Sunday PM Forecast: Hotter & drier next week, lower humidity in sight

1 hour 12 minutes 1 second ago Sunday, September 13 2026 Sep 13, 2026 September 13, 2026 4:59 PM September 13, 2026 in Forecast Discussion
Source: The Storm Station

When compared to this past week, next week will have much less showers and storms. It will be hot, but there are indications of a pretty significant humidity drop late week. 

Tonight & Tomorrow: Any remaining showers and storms will fade away in the overnight hours. Lows will be in the mid-70s under mainly clear skies. Sunshine will prevail to start off Monday. This will quickly send our temperatures into the 90s, with highs in the mid-90s expected by the afternoon. Peak heat index values look to get close, but fall just short of the 108° needed for a heat advisory. Still, given how close we will be, it is not impossible that we have one issued. Storm coverage will stay isolated meaning many will stay dry. Heavy rain and brief gusty winds will be possible for those who do see a storm. 

Up Next: The peak heat and lowest rain coverage will occur on Tuesday and Wednesday. Highs will reach into the mid to upper 90s. Storms will only be spotty in nature, so most will stay dry. This is pretty unusual heat for this time of year, so make sure to drink plenty of water. Something pretty interesting happens to end the workweek. As an upper-level low moves into the northeastern Gulf, it will bring in drier air from the north into southeast Louisiana. This will act to lower morning time lows, and also lower humidity during the day. Lows will be near 70° with some in the upper 60s. Peak heat index values will be 10-15° lower than earlier in the week. 


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The Tropics: Disorganized showers and thunderstorms persist in association with a trough of low pressure over the central Subtropical Atlantic. Strong upper-level winds are making the current environment unfavorable for development. However, the system is expected to move into a more favorable environment for some gradual development by the middle to later portion of this week. The disturbance is forecast to move west-northwestward across the central part of the Subtropical Atlantic.

– Balin

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