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In meteorology, the synoptic scale (also called the large scale or cyclonic scale) is a horizontal length scale of the order of 1,000 km (620 mi) or more. [1] This corresponds to a horizontal scale typical of mid-latitude depressions (e.g. extratropical cyclones ).
South Africa signed up to use ISO 8601 for date and time representation through national standard ARP 010:1989 in 1998 A.D. The most recent South African Bureau of Standards standard SANS 8601:2009 [1] "... is the identical implementation of ISO 8601:2004, and is adopted with the permission of the International Organization for Standardization" and was reviewed in 2016.
SYNOP (surface synoptic observations) is a numerical code (called FM-12 by WMO) used for reporting weather observations made by staffed and automated weather stations. SYNOP reports are typically sent every six hours by Deutscher Wetterdienst on shortwave and low frequency using RTTY .
South Africa is a sunny country, averaging 8–10 daily sunshine hours in most regions. [2] The average annual rainfall for South Africa is about 464 mm (compared to a global average of 950 mm [3]) but large and unpredictable variations are common. Overall, rainfall is greatest in the east and gradually decreases westward, with some semi-desert ...
The Todd Weather Folios are a collection of continental Australian synoptic charts that were published from 1879 to 1909. The charts were created by Sir Charles Todd's office at the Adelaide Observatory. In addition to the charts, the folios include clippings of newspaper articles and telegraphic and handwritten information about the weather.
Any tropical cyclone that develops within the Southern Hemisphere between Africa and 90°E is monitored by Météo-France's La Réunion tropical cyclone centre (MFR, RSMC La Réunion). [ 24 ] A tropical disturbance is MFR's generic term for a non-frontal area of low pressure that has organized convection and definite cyclonic surface wind ...
On 3 January 2021, according to the Météo-France, the remnants of Tropical Storm Chalane from the South-West Indian Ocean crossed southern Africa and briefly emerged into the eastern South Atlantic before dissipating. [153] On 7 January 2023, a subtropical depression formed about 500 km (310 mi) southeast of Rio de Janeiro. [154]
The Union of South Africa's Weather Service was established in 1912 under the Department of Irrigation, with Charles M Stewart as its first Chief Meteorologist. [1] At some point between 1912 and 1940, the SAWS' name was changed to the Meteorological Service , and in 1940, during the Second World War , became the responsibility of the ...