Simplify the following text for a Grade 4 native English-speaking person.
Original: Embedded within the southwesterly flow ahead of an approaching mid-level trough , it tracked quickly northward , and early on June 2 attained peak winds of 60 mph ( 95 km\/h ) .
Simplified: On June 2 , it reached its strongest with winds of 60 mph ( 95 km\/h ) .