Simplify the following text for a Grade 7 native English-speaking person.
Original: The 1992 Atlantic hurricane season brought a subtropical storm in April , before the official start of the season . The unnamed subtropical storm formed on April 21 in the southwest Atlantic and dissipated on April 24 .
Simplified: Subtropical Storm One started on April 21 , more than a month before June 1 , the start of hurricane season .