After watching System 90L, an area of low pressure develop, forecasters at the National Hurricane Center have formally renamed it to Arthur on May 17, 2020. Located offshore from the southeast coast of Florida, Arthur is the first named storm of the 2020 hurricane season which officially begins on June 1, 2020.
First observed as a low-pressure system, the system became more organized and better defined and was recategorized as a tropical storm by forecasters early in the morning on May 17. At 8 a.m. EDT on May 17, the storm was located off the coast of eastern Florida at latitude 30.3 north, longitude 77.4 west. Tropical Storm Arthur is currently moving north-northeast at a speed of about 9 mph (15 kph).