The Atlantic Ocean hurricane season doesn’t officially begin until June 1, but forecasters with the National Hurricane Center are already watching for possible development of a storm off the coast of Florida this week.

Nearly a month ahead of schedule, a system of thunderstorms in Florida and the Bahamas are being watched with a 60 percent change that they could form into a tropical or subtropical storm off the southeast coast of the United States within the next two days.

A flight to investigate the thunderstorms was cancelled this afternoon, but “conditions are expected to become gradually more favorable for development over the next day or so while the system moves slowly northward,” according to the National Hurricane Center forecast.

The next update from the National Hurricane Center is expected at 7 p.m.