2020 Hypothetical Atlantic hurricane season

The 2020 Atlantic hurricane season was an above average season, featuring 16 named storms, 9 hurricanes, and 3 major hurricanes. The season's strongest storm was Hurricane Josephine, although more notable storms included Hurricane Bertha, a very large storm that affected the United States east coast, and Hurricane Kyle, which struck South America as a major hurricane. The season officially started on June 1st and ended on November 30th. However, the season's last storm, Paulette, dissipated on December 16th.

Tropical Storm Arthur
An area of low pressure formed from a dissipating frontal boundary over the open Atlantic Ocean on May 30th. The low drifted erratically in varying directions until on June 1st, when it began to organize. As the system became more defined and convective, the NHC marked it as Potential Tropical Cyclone One At 10:00 UTC. 3 hours later, the disturbance was upgraded to Tropical Storm Arthur, marking the first time that a tropical or subtropical cyclone formed on the day of the start of an Atlantic hurricane season. Arthur drifted northeast towards Europe, maintaining intensity with wind speeds of 45 miles per hour for a few more days.

On June 4th, prevailing wind shear from the west caused Arthur to weaken. Combined with the cool waters of the North Atlantic, Arthur began to rapidly weaken until it degenerated to a post-tropical remnant low on June 5th. The remnants of Arthur continued northeast, bringing light rain and chilly weather to parts of western Portugal and later the British Isles. No damage was caused by the weak and short-lived storm, although its formation on June 1st was regarded as "right on the spot".