"On the forecast track, the center of Alberto will move over Alabama later tonight and Tuesday", the NHC said.
The storm was in southern Alabama as of early Tuesday morning, with winds of about 30 miles per hour, according to the National Hurricane Center.
Roughly a week before hurricane season officially begins, subtropical storm Alberto is making its way to the Florida panhandle and is expected to make landfall on Monday. According to the National Weather Service, some areas along Florida's west coast were forecast to get as much as 1-4 inches of rain.
Forecasters also warned people in those same areas and in southern SC of the possibility that "brief tornadoes" could develop as Alberto moved further inland.
Lifeguards posted red flags along the white sands of Pensacola Beach, where swimming and wading were banned amid high surf and risky conditions.
A Flash Flood Watch has been issued for Hancock, Baldwin, Jones, Monroe, Bibb, Crawford, Peach, Taylor and Macon counties until Wednesday morning. A tropical storm warning remained in effect stretching from Florida's Suwannee River to the border of Alabama and Mississippi.
Some 3,000 people were evacuated in the central province of Sancti Spiritus because of the flooding threat, the EFE news agency reported. Tropical storm warnings were up for parts of the Panhandle and the Alabama coast.
The storm formed and was named a subtropical storm on Saturday.
We dealt with some of the outer bands of the storm on Memorial Day and the remnants of Alberto will race to the north, moving into Tennessee and Kentucky heading into tomorrow. Florida Gov. Rick Scott, Mississippi Gov. Phil Bryant and Alabama Gov. Kay Ivey declared states of emergency.
Meanwhile, potentially life-threatening rough surf and rip currents continued on the northern Gulf Coast after Alberto rolled up big waves and tides along the coast. The North Carolina Highway Patrol said a large tree toppled on a TV news vehicle Monday afternoon near Tryon, North Carolina.
Forecasters said Alberto could bring unsafe high water to southern coastal states when it douses an area from MS to western Georgia with up to 30cm of rain and possible tornadoes.
Satellite photos (above) show the center of the storm just offshore of the Florida Panhandle, and the very obvious moisture feed from tropics - the tail - extending in a comma shape just offshore of the peninsula and continuing south.
The National Oceanic and Atmospheric Administration released the annual hurricane season forecast Thursday in which they call for 10 to 16 named storms, with five to nine hurricanes. One to four hurricanes could be "major" with sustained winds of at least 111 miles per hour (178 kph).(backslash)(backslash) If that forecast holds, it would make for a near-normal or above-normal season.