"Given the short period of time before Alberto makes landfall, its overall ragged appearance, and proximity to dry air, little change in strength is expected before the subtropical storm reaches the coast", said John Cangialosi, a hurricane specialist at the hurricane center.
Alberto, the first named Atlantic storm of 2018 which spun up days before the formal start of the hurricane season, is forecast to pack maximum sustained winds near 50 miles per hour (85 kph) and dump as much as 12 inches (30 cm) of rain, slamming an area from MS to western Georgia, it said.
On Sunday, gusty showers began lashing parts of Florida, and authorities were warning of the possibility of flash flooding. That was because the wind field east of the storm's center was so wide, Austin said.
The Florida Division of Emergency Management said in a news release Sunday that a mandatory evacuation has been issued in Franklin County for all barrier islands and for anyone living directly on the coastline, in mobile homes and in RV parks. For information specific to your area, please see products issued by your local National Weather Service forecast office.
In Gulfport, Mississippi, people lined up Sunday to fill 10- and 20-pound bags full of sand to use to block flooding from the storm.
Tommy Whitlock said sandbagging has become a usual event in his life since he lives next to a creek.
Winds of 40 mph extend outward up to 105 miles (165 km) from the center.
In this Saturday, May 26, 2018, photo provided by the Florida Keys News Bureau, Hannibal and Emily Baldwin pose for a wedding photo under an umbrella outside the Casa Marina Resort in Key West, Fla.
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The mistakes were obvious, we don't have to talk about that, it's all clear; he knows it, I know it, you all know it. Some of the more extreme posts also threatened Karius' girlfriend and some even said: "I hope you get cancer".
Alberto is expected to strengthen until it reaches the northern Gulf Coast, likely on Monday night.
Alberto got an early jump on the 2018 hurricane season, which doesn't officially start until Friday.
Tropical Storm Alberto will continue to influence the Suncoast weather for a couple of more days even though it is now moving farther and farther away from us.
Alberto is expected to drop 4 to 6 inches of rain along the Gulf Coast, with some places getting as much as a foot.
"As we continue to monitor Subtropical Storm Alberto's northward path toward Florida, it is critically important that all Florida counties have every available resource to keep families safe and prepare for the torrential rain and severe flooding this storm will bring". Tropical storm conditions are possible within the United States watch area beginning on Sunday.
There's a chance Alberto could come ashore early Monday, said Dan Pydynowski, a meteorologist with AccuWeather Inc.in State College, Pennsylvania.
What is a subtropical storm?