Tropical Depression 19 has formed and is expected to soon become Tropical Storm Sara, but the National Hurricane Center says there's a chance it won't reach hurricane strength.

Channel 9 meteorologists are monitoring an area of tropical disturbance south of Florida.▶ WATCH CHANNEL 9 EYEWITNESS NEWSUpdate 3:20 p.m.:Tropical disturbance 99L is spinning in the Caribbean, and will likely become Sara over the next several days across the western Caribbean.

A tropical wave producing a cluster of showers and thunderstorms across the Caribbean has a 90% chance of becoming a tropical depression by the weekend.