Simplify the following text for a Grade 13 native English-speaking person.
Original: The inner core of convection became ragged-looking on satellite imagery , and based on reports from Hurricane Hunters it is estimated the hurricane attained peak winds of 90 mph ( 150 km\/h ) late on September 10 .
Simplified: The inner core of convection became ragged-looking on satellite pictures , and based on reports from Hurricane Hunters it is estimated the hurricane reached peak winds of 90 mph ( 150 km\/h ) late on September 10 .