"Steady weakening is forecast after landfall, and Alberto will likely become a subtropical depression tonight or early Tuesday and degenerate into a remnant low by Tuesday afternoon".
The hurricane center said a tropical storm warning was in effect from the Suwannee River in Florida to the Alabama-Florida state line. A storm surge watch has been posted from the river to Mexico Beach, Florida.
Forecasters said Alberto could bring life-threatening high water to southern coastal states when it slams an area from MS to western Georgia with up to 12 inches (30 cm) of rain and possible tornadoes.
Monday: We are now see a small break in the shield of rain, but bands of rain with isolated storms are beginning to move into Southeast Alabama.
Forecasters say heavy rains from Subtropical Storm Alberto could cause flooding across most of SC.
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Subtropical Storm Alberto is pictured nearing the Florida Panhandle in this May 27, 2018 NASA handout photo. By early Monday morning Alberto slowed down, but a faster north-northwestward to northward motion is expected during the next few days. Maximum amounts of 15 inches are possible along Alberto's track from eastern Louisiana, across much of Mississippi, Alabama, western Tennessee and the western Florida panhandle, forecasters said. The storm's top winds fell to 60 mph and it's expected to weaken further after it moves over land, gradually falling apart over the next 36 hours until it's completely swallowed up by another weather system over Canada late this week. "Overnight Sunday night and into Monday, we should start to see a lot more widespread heavy rainfall associated with that storm system".
Rain is considered the main threat here, with downpours possible through Sunday, then becoming more scattered.
Subtropical Storm Alberto's gusty rain and brisk winds roiled the seas off the U.S. Gulf Coast on Monday, keeping white sandy beaches emptied of their usual Memorial Day crowds.
It is forecast to drop as much as 30cm (12in) of rain across MS to western Georgia and to bring storm swells of about 60-120cm (2-4ft) to low-lying areas.
"We've had a lot of rain, but we got lucky".
TVA is not anticipating major power outages as the storm moves north, although local distributors could face some electrical delivery problems and flash floods.