It's important to remember that tropical storms and hurricanes can change course rapidly, the current landfall predictions are still five-days out, and as residents in Puerto Vallarta know, these systems change course daily as they form.
Tropical Depression 21-E in eastern Pacific Ocean before strengthening into Tropical Storm Vance Thursday afternoon.
Further strengthening will occur through this weekend as the tropical cyclone remains over the warm waters of the eastern Pacific and in an environment that lacks disruptive wind shear, which can shred apart tropical systems.
The system is likely to strengthen into a hurricane by Sunday . . .
