A possible tropical system is forming off Africa’s coast, with development expected within the next week, according to the National Hurricane Center.

Tropical Storm Chantal has formed off the southeastern U.S. coast, prompting warnings for parts of the Carolinas. The National Hurricane Center expects storm conditions to impact the region later Saturday.

Tropical Storms Barry and Flossie have formed off Mexico’s coasts, with forecasters predicting several days of heavy rainfall that could impact coastal communities. The National Hurricane Center has issued warnings as the region braces for extended adverse weather conditions.