Simplify the following text for a Grade 9 native English-speaking person.
Original: Since the 2005 season had already used up all the assigned hurricane names , the Greek alphabet was used and the storm was named Alpha once it reached tropical storm strength . The name Alpha has been used before in the Atlantic for a subtropical storm , but the 2005 season was the first time to have a Tropical Storm Alpha .
Simplified: Tropical Storm Alpha was the 23rd named storm of the 2005 Atlantic hurricane season .