Tropical cyclones in 2013

Summary

During 2013, tropical cyclones formed in seven major bodies of water, commonly known as tropical cyclone basins. They were named by various weather agencies when they attained maximum sustained winds of 35 knots. Throughout the year, a total of 141 systems formed, with 89 of them being named. The most intense and deadliest storm of the year was Typhoon Haiyan, which had a minimum pressure of 895 hPa (26.43 inHg) and at least 6,352 deaths in the Philippines, while the costliest tropical cyclone of the year was Typhoon Fitow, which caused damages amounting to $10.4 billion in China, becoming its costliest typhoon at the time. Among this year's systems, twenty-one became major tropical cyclones, of which five intensified into Category 5 tropical cyclones on the Saffir–Simpson scale (SSHWS). The accumulated cyclone energy (ACE) index for 2013, as calculated by Colorado State University (CSU) was 618.5 units overall, which was below the 1981-2010 mean of 789.0 units globally.