What is a tropical storm watch?
"We need to really be careful with that rainfall", Graham added, noting that the storm was moving slowly at some 14 miles per hour northwards.
At 1000 AM CDT (1500 UTC), the center of Subtropical Storm Alberto was located near latitude 29.5 North, longitude 85.8 West.
A fisherman casts his line from the storm wall along Pascagoula Bay in Pascagoula, Miss., Sunday, May 27, 2018.
Alberto is expected to dump heavy rain on parts of Florida today and make landfall on the northern Gulf Coast Monday.
The Atlantic hurricane season lasts from June 1 until the end of November. However, the storm should not be taken as an indicator of how this hurricane season will play out, he said.
The storm was about 95 miles south-southwest of Apalachicola, Florida, moving northwest at 9 mph, the hurricane center said in an 11 p.m.
The center of the storm is expected to be move close to the western tip of Cuba on Saturday afternoon, then track up the eastern Gulf of Mexico in the night through Monday. Heavy rains are also expected in many areas, with some locations seeing between up to a foot of rain across the Florida panhandle into Alabama.
Forecasters say the most unsafe conditions could be in the mountains.
Mexico canceled its watch for the resort-dotted coast of the Yucatan peninsula, where the storm brought heavy rain.
Florida Governor Rick Scott issued the declaration for all 67 counties in his state.
A tropical storm watch is in effect for parts of MS and Alabama, meaning the conditions for a full storm are possible in the next 48 hours.
"Heavy rains and gusty winds continue to spread northward over Florida", the National Hurricane Center tweeted.
A tropical storm warning remained in effect stretching from Florida's Suwannee River to the border of Alabama and Mississippi. Rough conditions were expected to roil the seas off the eastern and northern Gulf Coast region through Tuesday. Storms and showers will return during the afternoon and evening carrying over into Tuesday.
Central Cuba.Additional 5 to 10 inches, isolated storm-totals of 20 to 25 inches.
The Florida Panhandle has been issued with a mandatory evacuation notice, affecting some 4,200 housing units, while Taylor County, to the east has a voluntary evacuation order in place for its coastal areas.
Please be prepared for possible areas of flooding and loss of electricity.
The National Oceanic and Atmospheric Administration released a hurricane season forecast Thursday that calls for 10 to 16 named storms, with five to nine hurricanes.
Residents in the western portion of the county can expect sustained winds of 20 to 30 miles an hour with gusts up to 40 miles an hour-mainly along the US 19 and Little Road corridors-beginning early this afternoon into the early overnight hours Monday.