Relationship of anomalies of (anti)cyclonicity to some significant weather events over the Australian region

Cyclonicity anomalies for February 1993, December 1993 and January 1994, and anticyclonicity anomalies for April 1993 are presented for the Australian region. The anomalies are based upon 23-year, monthly anticyclonicity and cyclonicity averages. Relationships between the synoptic systems which produced these anomalies, and resultant significant weather events, are discussed. These include: (a) a monsoon low centred in the Kimberley district of Western Australia, and resultant record rainfall registered in parts of the Kimberley plateau and central Northern Territory in February 1993; (b) a depression located in eastern Bass Strait, and resultant much above average rainfall recorded across most of Victoria in December 1993; (c) lows in the westerlies centred to the south of Tasmania, together with a heat low positioned across the northern interior of Western Australia, and resultant very high temperatures across eastern Queensland and New South Wales, with devastating bushfires over eastern parts of New South Wales in January 1994; and (d) anticyclones located in the western Tasman Sea, and resultant record high average temperatures registered across much of eastern Australia in April 1993.