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<!-- Created with subst: of Template:Hurricane season single. -->The 1946 Atlantic hurricane season resulted in no fatalities in the United States. However, tropical cyclogenesis began on June 13, three days before the official start of the season. There was a total of seven tropical storms, slightly below the contemporaneous 20-year average of 8.5 per season.
Tropical cyclogenesis began with the development of a tropical storm over the Gulf of Mexico on June 13. The next system formed offshore the Southeastern United States on July 5. Activity then ceased for nearly seven weeks, until August 25, when the third storm originated in the Bay of Campeche. Although September is the climatological peak of hurricane season, there was only one tropical cyclone that strengthened to tropical storm status that month. The season's most intense storm developed on September 12 and later peaked as a Category 2 hurricane with maximum sustained winds of and a lowest known barometric pressure of . Additionally, a tropical depression briefly existed near Central America. October was the most active month of the season, with three tropical cyclones. The third storm in October, which was the last system of the season, lasted until November 3.
The season's activity was reflected with an accumulated cyclone energy (ACE) rating of 20, the lowest total since 1925 and until 1983. ACE is, broadly speaking, a measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. It is only calculated for full advisories on tropical systems at or exceeding , which is tropical storm strength.
Systems
Tropical Storm One
A disturbance accompanied by a small area of convection developed into a tropical depression about south-southwest of Cape San Blas, Florida, at 12:00 UTC on June 13. Moving slowly northwestward, the depression intensified into a tropical storm early on the next day. The storm did not deepen beyond maximum sustained winds of , while historical weather maps indicated a barometric pressure of on June 15, the lowest in relation to the storm. Early on August 25, it is estimated that a tropical storm developed after a reconnaissance aircraft flight reported that the system acquired a well-defined circulation.
Tropical Storm Five
A low pressure area initially associated with two frontal systems developed into a tropical depression about southwest of Flores Island in the Azores at 12:00 UTC on October 1. After six hours, the depression intensified into a tropical storm. It intensified further while moving east-northeastward. On October 2, the system peaked with maximum sustained winds of and a minimum barometric pressure of , both of which were observed by ships. The storm then began losing tropical characteristics and merged with a frontal boundary around 12:00 UTC on October 3 while situated about south-southwest of Pico Island in the Azores. In many towns, telephone and telegraphic communications were cut off. Five deaths occurred in Cuba. Between 50%-70% of early fall crops in the area were damaged,