Hurricane Willa strengthened to a powerful Category 5 storm Monday morning, taking aim at the Mexican coast and threatening to deliver life-threatening storm surge, wind and rain. Now packing 160 mph winds, some strengthening was still possible for the storm Monday, making Willa "potentially catastrophic" for Mexico, the National Hurricane Center warned. It's expected to weaken when it makes landfall Tuesday but is forecast to bring large waves, dangerous storm surge, gusty winds and heavy rain. Mexico will begin to feel the impacts of Willa late Tuesday morning. The storm is forecast to make landfall south of Mazatlan Tuesday night...