The two almost Cat 5s of 2017. Tropical Cyclone (TC) Debbie made landfall as a Category 4 Severe Tropical Cyclone near Airlie Beach on 28 March 2017. â¦ Hurricane Maria was a deadly Category 5 hurricane that devastated Dominica, St Croix, and Puerto Rico in September 2017. Debbie intensified and had hurricane force wind speeds within a day of formation. September 2017 Tropical Cyclone Counts; Storm Type September 2017 September 1981-2010 Average Record Most for September Period of Record: 1949-2017; Tropical Storm (Winds >39 mph) 5: 3.6: 7 (2016) Hurricane (Winds >74 mph) 3: 2.2: 6 (1992 and 2016) â¦ Tropical cyclone, also called typhoon or hurricane, an intense circular storm that originates over warm tropical oceans and is characterized by low atmospheric pressure, high winds, and heavy rain.Drawing energy from the sea surface and maintaining its strength as long as it remains over warm water, a tropical cyclone generates winds that exceed 119 km (74 miles) per hour. Tropical cyclone Debbie formed in the Coral Sea northeast of Australia om March 24, 2017. July 2017 Tropical Cyclone Counts; Storm Type July 2017 July 1981-2010 Average Record Most for July Period of Record: 1949-2017; Tropical Storm (Winds >39 mph) 5: 3.6: 7 (1985, 2015, 2017) Hurricane (Winds >74 mph) 4: 1.9: 5 (2017) Major Hurricane (Winds >111 mph) 2: 1 (about one every three years) 3 (1978, 1985, 1992, 2017) Tropical Cyclone Debbie made landfall on March 28, 2017 in northeast Australia's Queensland state as the equivalent of a Category 4 hurricane on the Saffir-Simpson scale. Two tropical cyclones just missed achieving Category 5 status in 2017, topping out with 155 mph winds (157 mph winds are the threshold for a Cat 5). 25 - 29 March 2017 Summary. While headed toward northeastern Australia Debbie reached it's maximum sustained wind speeds estimated at over 100 kts (115 mph) on March 27, 2017 (UTC). June 2017 Tropical Cyclone Counts; Storm Type June 2017 June 1981-2010 Average Record Most for June Period of Record: 1949-2017; Tropical Storm (Winds >39 mph) 3: 1.9: 5 (1985) Hurricane (Winds >74 mph) 1: 0.8 (four every five years) 3 (1984) Major Hurricane (Winds >111 mph) 0: 0.3 (about one every three years) 2 (1978, 2010) Severe tropical cyclone Debbie made landfall near Airlie Beach on Queensland's Whitsunday coast on Tuesday, 28th March 2017, after crossing the Whitsunday islands as a large and powerful category 4 strength system. Significant fire and emergency service resources were mobilised. The 2017 hurricane season produced six tropical cyclones that developed in ideal environmental conditions allowing rapid intensification to occur. The 2017 Pacific typhoon season was a below-average season in terms of Accumulated Cyclone Energy and the number of typhoons and super typhoons, and the first since the 1977 season to not produce a Category 5-equivalent typhoon on the Saffir-Simpson scale.The season produced a total of 27 named storms, 11 typhoons, and only two super typhoons, making it an average season in terms â¦ Storm damage resulted from both the high winds associated with the cyclone, and the very heavy rain.