Weather tracker: Super Typhoon Sinlaku threatens Mariana Islands

Rapidly strengthening storm brings destructive winds, flooding risk and dangerous seas to western Pacific The Mariana Islands archipelago in the western Pacific, home to the US territories of Guam and the Northern Mariana Islands, is bracing for extreme weather early this week as Super Typhoon Sinlaku approaches. The system originated as a cluster of thunderstorms over the seas of Micronesia before strengthening into a tropical storm and then a typhoon on Friday and Saturday.