It reached its peak strength at winds of 100 mph ( 155 km\/h ) and a minimum central barometric pressure of 980 mbar ( hPa ; 28.94 inHg ) , making it a Category 2 , on October 29 . Grace reached its peak intensity with winds of 85 k and a minimum central barometric pressure of 980 mbar ( hPa ; 28.94 inHg ) , ranking as a Category 2 .