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On 27 November 2014, Brisbane was hit by a Mesoscale convective system [58] which brought wind gusts up to 141 kilometres per hour (88 mph), reaching speeds of Category 2 tropical cyclones, and hail stones up to 8 centimetres (3.1 in) in diameter. It was the worst storm to hit Brisbane since 18 January 1985 [59] and caused over A$ 1 billion in ...
Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa ), which is equivalent to 1,013.25 millibars , [ 1 ] 760 mm Hg , 29.9212 inches Hg , or 14.696 psi . [ 2 ]
Cyclone Tracy devastated the city of Darwin, Northern Territory, Australia, from Christmas Eve to Christmas Day, 1974.It is the most compact cyclone or equivalent-strength hurricane on record in the Australian basin, with gale-force winds extending only 48 kilometres (30 mi) from the centre and was the most compact system worldwide until Tropical Storm Marco of the 2008 Atlantic hurricane ...
The foundation cited a 2023 study of more than 15,000 migraine sufferers in Japan that linked an increase in headaches during barometric pressure changes, humidity and rainfall.
Tropical cyclones are non-frontal, low-pressure systems that develop, within an environment of warm sea surface temperatures and little vertical wind shear aloft. [1] Within the Australian region, names are assigned from three pre-determined lists, to such systems, once they reach or exceed ten–minute sustained wind speeds of 65 km/h (40 mph), near the center, by either the Australian Bureau ...
The larger the change in pressure, especially if more than 3.5 hPa (2.6 mmHg), the larger the change in weather can be expected. If the pressure drop is rapid, a low pressure system is approaching, and there is a greater chance of rain. Rapid pressure rises are associated with improving weather conditions, such as clearing skies. [67]
Brisbane's wettest day occurred on 21 January 1887, when 465 millimetres (18.3 in) of rain fell on the city, the highest maximum daily rainfall of Australia's capital cities. The wettest month on record was February 1893, when 1,025.9 millimetres (40.39 in) of rain fell, although in the last 30 years the record monthly rainfall has been a much ...
Contemporary reports vary considerably in the reported lowest barometric pressures. The pressure recorded on the schooner Olive reasonably consistently show her lowest pressure recorded: 29.60 inches of mercury (1,002 hPa) to 29.10 inches of mercury (985 hPa) [22] or between 29.00 inches of mercury (982 hPa) and 29.10 inches of mercury (985 hPa ...