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Cyclone Larry

2006 tropical cyclone

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Through Australia

Throughout Queensland, Cyclone Larry resulted in roughly AU$1.5 billion (US$1.1 billion) 2006 USD or AU$2 billion (US$1.55billion) 2022 USD in damage. At the time, this made Larry the costliest tropical cyclone to ever impact Australia; surpassing Cyclone Tracy in 1974 (not accounting for inflation). In 2011, Cyclone Yasi surpassed the damage total caused by Larry.

Meteorological history

Larry began as a low pressure system over the eastern Coral Sea that was monitored by the Australian Bureau of Meteorology from 16 March 2006. It formed into a tropical cyclone 1,150 kilometres (710 mi) off the coast of Queensland, Australia on Saturday 18 March 2006. Larry was a Category 2 cyclone in the Australian intensity scale when the cyclone watch commenced, and gradually intensified to a high Category 5 cyclone on that scale. The eye of Larry crossed the coast in between Gordonvale and Tully between 6:20 am and 7:20 am AEST on 20 March 2006. According to preliminary data, the winds may have reached 290 kilometres per hour (180 mph) with gusts to 310–320 kilometres per hour (190–200 mph). However, re-analysis based on land observations indicated that Cyclone Larry was a Category 4 cyclone during landfall, as wind gusts were estimated to have reached 240 kilometres per hour (150 mph) in the area of impact.

The Australian intensity scale is based on maximum wind gusts, which are estimated to be 40 percent above 10-minute sustained winds. On this scale, Larry peaked as a Category 5 cyclone, during landfall. On the Saffir-Simpson Hurricane Scale, the Joint Typhoon Warning Center's maximum 1-minute wind speed assigned to the cyclone define it as a Category 4-equivalent storm.

Based on estimated winds speeds required to destroy simple structures, a damage survey of buildings in the Innisfail region estimated peak gust wind speeds (in reference to flat open country at a height of 10 metres (33 ft)) across the study area to range from 180 to 300 kilometres per hour (110 to 190 mph). This estimate correlates with the Bureau of Meteorology's re-analysis of Cyclone Larry at landfall. Their reviews of data suggest that Larry was a Category 5 system when it crossed the coast. It was confirmed by the Bureau of Meteorology in March 2007 that the cyclone made landfall as a Category 5 cyclone.

A 10-minute average wind speed of 108 knots (200 km/h; 124 mph) was reported in Innisfail during landfall, theoretically corresponding to 1-minute sustained winds of 125 knots (232 km/h; 144 mph), and maximum wind gusts generally consistent with a Saffir-Simpson scale Category 5 storm.

At 1 am Australian Eastern Standard Time on 21 March 2006, Larry was downgraded to a Tropical Low pressure system as it moved inland. Ex-tropical cyclone Larry was further tracked as it moved into western Queensland to the north of Mount Isa. Larry's short life as a cyclone is attributed to its speed; the system moved very quickly over the Coral Sea dissipating nearly 24 hours after landfall. Cyclone Larry was considered to be the worst cyclone to hit the coast of Queensland since 1931, until it was surpassed by Cyclone Yasi in 2011; consequently, the name "Larry" was retired on 12 December 2006.

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