Heavy rainfall and tropical storm conditions will likely reach the northern Gulf Coast well before the arrival of the center of Alberto.
Here are the key messages for #Alberto as of 10 am CDT/11am EDT.
The storm had maximum sustained winds of 85kms/h and was moving north at 13kms/h. New flash flood watches have been issued for parts of the Carolinas, where 2 to 6 inches of rain is possible. One to four hurricanes could be "major" with sustained winds of at least 111 miles per hour.
A subtropical storm like Alberto has a less defined and cooler centre than a tropical storm, and its strongest winds are found farther from its centre. Tropical Storm Arlene formed in the Central Atlantic Ocean last April, but had fairly minimum impacts on land.
All three counties are in north Florida.
The Storm Prediction Center outlines a low-end, "marginal" risk of severe storms in the region Tuesday because of Alberto's remnants; the primary threat would be a brief tornado developing within the tropical rain bands.
"This is definitely a risky storm".
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The National Weather Service is predicting a 25 percent chance of showers at 2 p.m., 30 percent chance of rain at 3 p.m., 36 percent chance of rain at 4 p.m. and 41 percent chance of rain at 5 p.m.
The storm system could move slowly through Upstate; if so, that would increase the chances of heavy rain. "So how often can you say you rode a storm out?"
A two- to four-foot storm surge or rise in water is still expected along the coast to the right/east of where Alberto makes landfall.
Alberto disrupted long Memorial Day holiday weekend plans along from Pensacola in the Florida Panhandle to Miami Beach and other areas along the northern Gulf Coast, forced beachgoers out of the the water and prompted evacuations of low-lying areas.
Subtropical Storm Alberto was moving northward through the Gulf of Mexico on Sunday.
A Storm Surge Watch is in effect for ...
A Flash Flood Watch has been issued for Hancock, Baldwin, Jones, Monroe, Bibb, Crawford, Peach, Taylor and Macon counties until Wednesday morning. Alberto's heavy rains and and gusty winds remain predominantly on the right side of the storm, and therefore heavy rain and some gusty winds are expected across much of Florida Sunday. The NHC canceled a tropical storm warning west of the Alabama/Florida border.
"There is still uncertainty of where landfall will occur, which will likely be late Monday or early Tuesday morning", Director of Alabama Emergency Management Agency Brian E. Hastings said, but he urged residents and tourists to stay informed on the latest regional forecast. Winds of 40 mph extend outward from the center of the storm up to 150 miles.