At the moment its growth is being hindered by strong winds in the upper atmosphere, but as the storm tracks northwards these winds are expected to ease, allowing the storm to complete its transition into a fully tropical system.
It's not been an ideal holiday weekend so far for the state as both Saturday and Sunday have offered up scattered showers and thunderstorms. A tropical storm warning has been issued for the Dry Tortugas.
"The track of these storms can change without notice", Scott said.
About 130 to 250 millimetres of rain are possible along affected areas in eastern Louisiana, Mississippi, Alabama, western Tennessee and the western Florida Panhandle.
Daniel Brown, meteorologist at the National Hurricane Centre in Miami, said Alberto's strongest winds have already peaked at 50mph and it does not have a great chance to get much stronger.
The rain could be heavy at times through Tuesday, with 2-4 inches possible, and there is the potential for flash flooding.
"We expect heavier rain tomorrow throughout the day", said Chris Fisher, a metereologist for the Miami office of the National Weather Service.
Florida, Alabama and MS launched emergency preparations on Saturday.
Since it has been pushing north-northeast over the last 6 to 12 hours, its slightly closer approach to the west coast of Florida has prompted tropical storm warnings to be posted for the coastline.
Even though South Florida is not in the projected path of Alberto, the region is on the east side - the wettest side - of the storm.
The Air Force Reserve's Hurricane Hunters again flew out Saturday to gather data on the storm, and it has not strengthened much if at all, the center says.
"There are no strong climate signals saying it's going to be extremely active, like previous year, or extremely weak", said Gerry Bell, the lead hurricane forecaster at NOAA's Climate Prediction Center, speaker with reporters Thursday.
Gulf Coast residents should "take this storm seriously", the National Weather Service said early on Sunday, as Subtropical Storm Alberto drove north, threatening heavy rains and winds to the southern coastal states.
The latter will have the better chance of seeing water rise as at that time we will have a more on shore wind component. Right now, our forecast calls for widespread amounts of 1 to 4 inches of rain in the area.
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