Tropical Depression Nineteen formed in the Caribbean early Thursday with the National Hurricane Center forecasting it to grow into Tropical Storm Sara. Long-term forecast models show it could

A storm system, which would earn the name “Sara,” is expected to form soon in the Caribbean, and could affect the United States down the road. It’s too early to know exactly where the storm will go once it forms and what areas will be affected — particularly because the system has no established center of circulation yet.