The latest guidance shows this system strengthening into a tropical depression within the next 24 hours and possibly tropical storm as early as Monday.
South and southeast winds from the storm threatened to push water north into Terrebonne and Lafourche's bayous and marshes.
Hurricane Leslie, located in the north-central Atlantic, posed no threat to Cayman. The National Hurricane Center is forecasting a high probability of tropical development at 100%. If that happens, it will be tropical storm Michael.
Forecasters are 90 percent confident the system will upgrade into a cyclone in the next five days, likely forming in the northwestern Caribbean Sea or the southern Gulf of Mexico.
Maximum sustained winds remain near 30 miles per hour (45 km/h) with higher gusts. A reconnaissance plane will investigate the system this afternoon.
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The National Hurricane Center is now considered about two main hazards: wind and rainfall.
The low pressure center over Oklahoma that helped to provide scattered showers on Saturday, will travel north along the frontal boundary into IL on Sunday.
It was too early to tell whether the storm would impact Terrebonne, Lafourche or Louisiana, forecasters said.
The cold front that moved through last night has stalled just to our south bringing us a good bit of cloud cover through today and a chance at some isolated showers. We need to pay attention to this system.
We're talking temperatures that could be in the 60s and low 70s during the day and 40s at night. The Category 1 hurricane will continue to move northward, before shifting east in the open ocean.