Simplify the following text for a Grade 9 native English-speaking person.
Original: The Atlantic hurricane season officially began on June 1 , but activity in 1990 began five days earlier with the formation of Tropical Depression One on May 25 .
Simplified: The 1990 Atlantic hurricane season officially began on June 1 , 1990 , and lasted until November 30 , 1990 . However storms can form outside these dates for example , Tropical Depression One form on May 25 .