Alberto, with maximum sustained winds of 40 miles per hour, is moving east at 2 miles per hour near the Yucatan Peninsula and is forecast to begin moving north Friday night.
"Regardless of development, very heavy rain and flooding are possible for portions of South FL this weekend", the National Weather Service said.
The storms' names come from six lists that are recycled, so this year's was previously used in 2012.
Alberto forms in the Gulf, flooding rains forecast
Atlantic tropical storms have formed in May several times in the past decade: Arthur in 2008, Alberto and Beryl in 2012, Ana in 2015 and Bonnie in 2016. With a subtropical storm, the strongest winds and thunderstorms are located far away from the center, even though they may be just as strong as those found in a tropical storm.
Heavy rain will likely begin to affect the central Gulf Coast region and the southeastern US later this weekend and continue into early next week.
The storm, while projected to bring heavy rainfall and flooding to areas in Florida and some Gulf Coast states both this weekend and into early next week, will not become a hurricane, according to NOAA. Alberto is forecast to move north-northeast and strengthen off the west coast of Florida Saturday into Sunday before reaching the Panhandle or northeast Gulf coast late Sunday into Monday.
It's called a "subtropical storm" because it's something of a hybrid between a nontropical low-pressure area and a classic tropical storm.
On Thursday, there were severe storms that blasted from the Midwest to the East Coast. Gusty winds and rough seas should increase Saturday, with tornadoes possible Saturday and Sunday. It became a tropical storm that meandered off the cast coast of Georgia and SC.
- Reggie Bush Says Donald Trump Needs To 'Stay In His Lane'
- Crude oil slips 36 cents after surge in U.S. crude inventories
- North Korea poised to demolish nuclear test site amid Trump summit doubts
- Battlefield 5 reveal trailer shows return to World War 2
- Only one age 33 playoffs even to compare to James
- Erdoğan congratulates Venezuela's Maduro on re-election
- US newspaper websites blocked in EU after missing GDPR deadline
- ACLU tells Amazon to stop selling facial recognition tech to police
- Summer Reading kicking off at the library
- Rockets rally past Warriors in 4th to even series