Heavy Rain Update: September 11, 2026

Here is an update concerning the heavy rain threat today and Saturday:

 

WHAT: MARGINAL RISK of Heavy Rain that could lead to flash flooding

 

WHEN:  Mainly during the daylight hours Friday and Saturday

 

WHERE:  All of southeast Louisiana and south Mississippi

 

CONFIDENCE: We are confident that there will be thunderstorms across the area and that a few will produce heavy rainfall.  We are less confident in exactly where the greatest threat will be.

 

IMPACTS:

  • Additional rainfall of 1 to 3 inches is currently forecast with isolated spots of 3 to 5 inches or more.
  • High rainfall rates will quickly lead to runoff with ponding of water in low lying areas and localized flash flooding.
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