The floods were a result of heavy precipitation caused by Tropical Cyclone Tasha that combined with a trough during the peak of a La Niña event. A massive flood plume inundated coral reefs lying 12 km offshore of the Central Queensland coast near Yeppoon and caused 40â100% mortality to coral fringing many of the islands of Keppel Bay down to a depth of â¼8 m. Water released from the Wivenhoe Dam exacerbated the situation, raising the Brisbane River to a peak flood level of 4.5m. In Brisbane, the river peaked at 4.46m on 13 January, flooding more than 28,000 homes and leaving 100,000 without power. How did Cyclone Tasha trigger the floods? Beginning with rains in September and then culminating with Category 1 Cyclone Tasha crossing the Far North Queensland coast on 24 December 2011, this was probably the most notorious flood in Australian history. Flash flooding is expected to inundate far north Queensland after a category one cyclone crossed the coast this morning. The main cause this time around was Cyclone Tasha, a tropical storm which hit the area, combined with the La Niña, a phenomenon where wet ⦠This flood inundated 35 suburbs and more than 14,000 properties. In December 2010, the highest recorded Queensland rainfall associated with Tropical Cyclone âTashaâ caused flooding of the Fitzroy River in Queensland, Australia. 3 4 5. 2011-11-16 09:19:13 2011-11-16 09:19:13. Cyclone Tasha Adds to Severe Flooding Over Eastern Australia ⺠View larger image TRMM captured this image of Tasha at 15:32 UTC (5:32 am AEST) on the 24th of December 2010 just before it became a Category 1 cyclone. Cyclone Tasha causes major flooding in Queensland . This made the flooding even worse resulting in heavy flooding. The flooding caused leeves and dams to break. Asked by Wiki User. There was already heavy rain and flooding in parts of Queensland and when Cyclone Tasha hit it produced wide-spread torrential rains. Wiki User Answered . Did cyclone tasha cause flooding in QLD in 2011? The 2010 La Niña weather pattern, which brings wetter conditions to eastern Australia, was the strongest since 1973. In the aftermath of the floods, the coal industry suffered. of the 2011 Fitzroy River flood caused by Cyclone âTashaâ on reefs in Keppel Bay, five reef areas that were likely to be impacted by the flood and were lying in a continuum of distance from the Answer. Over the following days several Queensland towns were declared disaster areas, and there were more deaths and injuries. Top Answer. Compounding the effect was the arrival on December 25 of Tropical Cyclone Tasha, which made landfall south of Cairns, in the northeast; the storm brought another 6 to 10 inches (150â250 mm) of rain to Australiaâs east coast. 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