...ERNESTO BECOMES A POWERFUL POST-TROPICAL CYCLONE OVER THE NORTH ATLANTIC... ...THIS IS THE LAST NHC ADVISORY... As of 3:00 PM GMT Tue Aug 20 the center of Ernesto was located near 49.0, -44.7 with movement NE at 37 mph. The minimum central pressure was 987 mb with maximum sustained winds of about 70 mph.