The four "zones" are expected to spawn storms in the Caribbean, the southeast coast of the U.S., the Gulf Coast of the U.S. and the Lesser Antilles, though most of those storms will just involve downpours. Dexter started forming this week.

Atlantic hurricane season has woken up as we enter what is historically the most active time of year. From the western and central Atlantic to Africa, there are multiple areas to watch for tropical development right now.