Hurricane Alex was the first tropical cyclone of the 2010 Atlantic hurricane season, and a rare June Atlantic hurricane. Originating from an area of disturbed weather on June 25, 2010, it slowly developed in the western Caribbean Sea and struck Belize as a strong tropical storm. After entering the Gulf of Mexico, Alex became very large and encountered conditions favorable for gradual development. Early on June 30, the cyclone attained hurricane status as it approached northeastern Mexico, the first June hurricane in the Atlantic basin since Hurricane Allison in 1995, and the storm rapidly intensified just off the coast of Tamaulipas. Alex made landfall near Soto la Marina as a Category 2 hurricane on the Saffir-Simpson Hurricane Wind Scale. Alex rapidly weakened after landfall, with the storm losing its tropical status on July 2, before fully dissipating on July 6.

The 2010 Atlantic hurricane season was the first of three consecutive very active Atlantic hurricane seasons, each with 19 named storms. This above average activity included 12 hurricanes, equaling the number that formed in 1969. Only the 2020 and 2005 seasons have had more, at 14 and 15 hurricanes respectively. Despite the high number of hurricanes, not one hurricane hit the United States making the season the only season with 10 or more hurricanes without a United States landfall. The overall tropical cyclone count in the Atlantic exceeded that in the West Pacific for only the second time on record. The season officially began on June 1 and ended on November 30, dates that conventionally delimit the period during each year when tropical cyclone formation is most likely. The first cyclone, Alex intensified into the first June hurricane since Allison in 1995. The month of September featured eight named storms. October featured five hurricanes, including Tomas, which became the latest on record in a calendar year to move through the Windward Islands. Activity was represented with an accumulated cyclone energy (ACE) value of 165 units, which was the eleventh highest value on record at the time. The activity in 2010 was heightened due to a very strong La Niña, which also led to an inactive Pacific hurricane season.