The storm had top sustained winds of 40 miles per hour was expected to strengthen as it moves over the eastern Gulf of Mexico.
By Saturday morning, the storm was gathering strength as it moved north.
The flood watch runs to 8 p.m. Sunday, during the period when Alberto is expected to pass closest to South Florida on its course toward the northern Gulf coast.
A tropical storm warning has been issued for the Mississippi/Alabama border to the Aucilla River in Florida.
Parts of the Alabama and Florida coast were placed under a tropical storm warning Saturday afternoon with MS still under a watch. The forecast from the Weather Prediction Center still estimates up to 4 inches or more of rain could fall in Volusia County, where a flood watch is in effect. The season officially starts on June 1.
Descartes recalled that in 2012 a tropical cyclone, also called Alberto, formed ahead of the official start of the season.
Forecasters at the National Weather Service warned residents along coastal Alabama and MS as well as the Florida Panhandle to brace for heavy rain and high winds.
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Summer Reading at Mary Wood Weldon Memorial Library will kick off on Saturday, June 2 with a big celebration from 10 a.m.to noon. Throughout the summer, the library also scheduled special events to fit with the Libraries Rock theme every Wednesday at 1 p.m.
Rain is considered the main threat here, with downpours possible through Sunday, then becoming more scattered.
Alberto is likely to bring flooding and torrential rains to both states, according to the Miami Herald and Clarion Ledger, and a tropical storm watch has been issued for Florida's panhandle west of Gulf County. It will head for the WKRG News 5 area, for a likely landfall Monday somewhere from the MS coast to the Florida Panhandle, as a strong Tropical Storm.
Stay tuned to Space Coast Daily for updates on Subtropical Storm Alberto and information regarding the rest of the 2018 hurricane season.
Rip Currents: Moderate risk today and high risk Sunday and Monday as onshore winds and seas increase. Rainfall in Flagler County could be up to 3 inches, the National Weather Service said, although higher amounts of rain might be possible in isolated locations.
Alberto will move further north in the Gulf Of Mexico, passing west of the peninsula of Florida.
Along the coast three to six inches of rain are expected.
"This system will bring excessive rainfall to the watch area beginning Saturday evening and continuing through Tuesday evening". Some locally heavy rain bands will be possible. "We're dealing with an upper-level trough over the Gulf of Mexico that is kind of helping things storm-wise over the last few days, and that's continuing".