Forecasters said Tropical Storm Peter formed over the Atlantic Ocean early Sunday, and a new tropical depression was spinning over the far eastern Atlantic.
The tropical storm was expected to bring rain to the islands including the Virgin Islands and Puerto Rico through Tuesday.
Forecasters expected 1 to 2 inches of rainfall through Tuesday.
Top winds were around 40 mph and Peter was moving northwest at 15 mph.
The tropical depression had a maximum sustained winds around 35 mph.
The system was expected to become a tropical storm later Sunday or on Monday.
— National Hurricane Center (@NHC_Atlantic) September 19, 2021
Only two other Atlantic hurricanes seasons have had 16 named storms by Sept. 19 since the satellite era began in 1966. Those were the 2005 and 2020 seasons according to hurricane researcher Phil Klotzbach.