The 2008 Atlantic hurricane season was an event in the annual tropical cyclone season in the north Atlantic Ocean. An above-average Atlantic hurricane season season, it was the first on record to have a major hurricane in every month from July to November.

Tropical Storm Arthur was the first Atlantic tropical storm that formed during the month of May since 1981. The first tropical cyclone of the 2008 Atlantic hurricane season, the storm formed on May 30, 2008 from the interaction of two tropical waves and the remnants of the eastern Pacific Tropical Storm Alma, which had crossed into the western Caribbean Sea. The system quickly organized and was named Tropical Storm Arthur on May 31, while crossing the shore of Belize. It dissipated two days later over the Yucatán Peninsula in Mexico. Arthur and its remnants triggered severe flooding which killed a reported nine people and affected 100,000 more in Belize. Damage was light to moderate, estimated at $78 million (2008 USD).