Description

Storm Daniel, also known as Cyclone Daniel, was a catastrophic tropical cyclone that became the deadliest Mediterranean tropical-like cyclone in recorded history, as well as the second-costliest tropical cyclone on record outside of the North Atlantic Basin. Forming as a low-pressure system around 4 September 2023, the storm affected Greece, Bulgaria, and Turkey with extensive flooding. The storm then organized as a Mediterranean low and was designated as Storm Daniel. It soon acquired quasi-tropical characteristics and moved toward the coast of Libya, where it caused catastrophic flooding caused by the collapse of two dams, Derna and Mansour, resulting in the flooding of the Wadi Derna river causing catastrophic damage to the city of Derna. After collapsing the two dams, Storm Daniel degenerated into a remnant low. The storm was the result of an omega block; a high-pressure zone sandwiched between two zones of low pressure, with the isobars shaping like the Greek letter omega (Ω).