[3] Later that day, the remnants of Alma merged with another tropical wave in the western Caribbean, which sparked the development of a new surface low.

A broad upper-level ridge was anchored over the Gulf of Honduras, which covered the entire region and maintained deep tropical moisture.

Despite moving ashore, the system was named Tropical Storm Arthur about 45 mi (72 km) north-northwest of Belize City.

[6] In post-analysis, it was determined that Arthur had developed more than 12 hours earlier, late on May 30, and made landfall early on May 31 with 45 mph (75 km/h) winds in northeastern Belize.

[4] While over land, Arthur maintained minimal tropical storm force winds, concentrated primarily over open waters to the east and northeast.

[10] While drifting southwestward over land, Arthur weakened further, and the National Hurricane Center issued its last advisory on the system late on June 1.

[14] In preparation for the storm, ports were closed in the Mexican state of Quintana Roo, while residents and tourists were encouraged to take precautions in coastal areas.

[4] The storm produced rainfall as far south as Belize City and kicked up strong surf on the island of Ambergris Caye.

Prime Minister Dean Barrow declared a disaster area in southern Belize's Stann Creek Valley.