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Early-Season Tropical Storm Forms Off Carolinas May 25, 2012
Satellite Image
Tropical Storm Alberto can be seen becoming more well defined near Charleston, S.C., on Sunday.
Tropical Storm Alberto formed just off the South Carolina coast late Saturday evening, nearly two weeks before the official start of the Atlantic hurricane season.

Maximum sustained winds reached only about 40 mph before the storm lost force and weakened to a tropical depression while moving deeper into the Atlantic.

Alberto was the earliest-forming tropical storm in the Atlantic Basin since Ana emerged on April 21, 2003.

Alberto was also one of only three Atlantic tropical storms to form in May over the past 31 years, according to Weather Underground's Jeff Masters.

Tropical Storm Alberto Track

Satellite Loop Data: CIMSS