Tropical depression could form in Gulf Coast this week USA TODAYTropical System Organizing, Strengthening In Gulf The Weather ChannelPotential Tropical Cyclone Six forms in Gulf with tropical storm watch issued for Mexico CNNSunday Tropics Update: NHC begins issuing advisories on soon-to-be Francine KPRC Click2HoustonInvest 91L to become tropical storm or hurricane as millions along Gulf Coast prepare for potential impacts Fox Weather