New Orleans Weather Update: September Heat Holds, Storm Risk Returns by Saturday Afternoon

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Gretna, La. – Louisiana drivers and residents should brace for a hot stretch with storm chances building by Saturday afternoon, threatening weekend plans. Temperatures will push into the 90s daily, and storms could impact travel on US-90 and neighborhood roadways from Gretna to New Orleans. Those planning outdoor events, including football games and festivals, should prepare for sudden delays.

According to the National Weather Service in New Orleans, storm chances rise to 30 percent Saturday evening, with the heaviest activity expected Sunday. Wind gusts may reach 20 mph during stronger storms. Forecasters urge residents to stay weather-aware and avoid flooded roadways during downpours.

Thursday and Friday remain mostly sunny and hot, with highs near 90 and overnight lows in the mid-70s. Saturday will bring increasing humidity and isolated thunderstorms by late afternoon. Sunday carries the greatest storm potential, with showers and thunderstorms likely after 1 p.m. Conditions should improve slightly Monday, though scattered rain may return early next week.

Travelers on I-10 and US-90 should expect brief heavy rain and reduced visibility during storms. Officials advise avoiding unnecessary travel during peak rain and securing outdoor items that could blow around in gusty winds.

The pattern signals the start of fall weather shifts in Louisiana, with lingering heat mixing with late-summer thunderstorms. More advisories are possible through the weekend.

Five Day Forecast for Gretna, La.

  • Thursday Night: Mostly clear, low near 76.
  • Friday: Sunny, high near 91.
  • Saturday: Mostly sunny, high near 90. 20% chance of afternoon storms.
  • Sunday: Thunderstorms likely after 1 p.m., high near 90. Gusts up to 20 mph.
  • Monday: Mostly sunny, high near 86.