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NHC raises 7-day development odds for Gulf disturbance Invest 91-L to 50%

The disturbance is in the eastern Gulf of Mexico and now has an increased chance of forming, the National Hurricane Center says.

Published Jul 18, 2026, 9:17 PM EDT | LehighValleyLive

The National Hurricane Center has increased the chances of a tropical disturbance, known as Invest 91-L, developing to 50 percent over the next 7 days.