Hurricane watch issued for parts of Florida as forecasters call for Debby to strengthen in the Gulf  CNNTropical depression track shifts west. Heavy rain remains a threat for South Florida  Miami HeraldTropical Depression Four Tracker: Spaghetti Models, Satellite And More  The Weather ChannelHurricane Watch issued in Florida as Tropical Depression 4 expected to strengthen into Debby  Fox Weather Tropical Storm Debby to form Saturday, impact Southwest Florida  NBC2 News