Simplify the following text for a Grade 12 native English-speaking person.
Original: Early on August 19 after entering Oklahoma , the remnants of Erin suddenly re-intensified to maximum sustained winds of 60 mph ( 95 km\/h ) a short distance west of Oklahoma City .
Simplified: Early on August 19 after entering Oklahoma , Erin suddenly re-intensified to maximum sustained winds of 50 mph ( 80 km\/h ) a short distance west of Oklahoma City .