The 2017 Atlantic hurricane season was the 2nd most active season, behind 2005. It gave off 30 depressions, which 27 strengthened into named storms, ?? became hurricanes, and ?? became major hurricanes.
On May 25, a extratropical low became subtropical and strengthened into Subtropical Depression One. The depression shortly afterward intesified into Subtropical Storm Arlene. Arlene became tropical on May 29. Tropical Storm Arlene slowly moved into the Gulf of Mexico and intesified into a Category 1 hurricane on June 1. The next day, Arlene intesified again to a Category 2 hurricane. Arlene made landfall in New Orleans, Louisiana on June 4 as a Category 1 and became extratropical the next day.