Super Typhoon Atsani was one of two powerful typhoons to spin across the Northwest Pacific Ocean in mid-August. Unlike its sister storm, Typhoon Goni, Atsani recurved out to sea southeast of Japan rather than making landfall anywhere.The storm did attain super typhoon status, however, maxing out at sustained winds of at least 160 miles per hour, according to the Joint Typhoon Warning Center.But the storm did not simply die as it got caught up in the midlatitude jet stream winds. Instead, it was transformed into a huge and powerful extratropical storm. What this means is that it went from a storm that had a warm core, with its center milder than the surrounding air, into a cold core system.Animation Courtesy: CIMSS
