Well, this season sure started early for both basins!
The Eastern Pacific had Aletta before May 15, and now the Atlantic gets Alberto before June 1. Mac, the winds are only at 45 mph. You're looking at the wrong graphic in your post. NHC provides us this interesting factoid from its discussion product:
ALBERTO IS EARLIEST-FORMING TROPICAL STORM IN THE ATLANTIC BASIN
SINCE ANA IN 2003. THIS IS ALSO THE FIRST TIME THAT A TROPICAL
STORM HAS FORMED BEFORE THE OFFICIAL START OF THE HURRICANE SEASON
IN BOTH THE ATLANTIC AND EAST PACIFIC BASINS.