The second tropical storm of the 2021 Atlantic hurricane season has formed hundreds of miles off the mid-Atlantic coast.

On Monday evening, the National Hurricane Center upgraded Bill to a tropical storm. It's currently churning out in the Atlantic Ocean with maximum sustained winds of 50 mph, as of 7 a.m. ET Tuesday.

When storms over the Atlantic begin to organize into a rotating system around a central "eye," and sustained wind speeds in the storm reach 39 mph, it's classified as a tropical storm. Once wind speeds in the system reach 74 mph, it becomes a hurricane.

Tropical Storm Bill is not expected to make landfall in the U.S., according to the National Hurricane Center's projections on Monday. The agency expects Bill to take a sharp turn northwest and eventually make landfall in Newfoundland on Wednesday afternoon.

One other storm has reached tropical storm status in 2021. Ana formed as a tropical storm in the Atlantic, where it circled for several days before breaking up in late May.