Last month's noteworthy events

By Peter Nelson on May 01, 2017
  • Last month's noteworthy events

    Warm sunny days are anticipated on most days the next fortnight after some early frosts. A few places have had their first frost for the winter last weekend.

The most noteworthy weather events across the Nation included a month of no rain in Perth, late season tropical cyclones, Cook and Frances, widespread heavy rains over most of South Australia and Victoria and in the Riverina , and low rainfalls in inland parts of NSW north from Condobolin to well into QLD. 

After recording one of the wettest January to March periods on record in Perth , no rain fell during April . There has been only 3 previous occasions in the last 140 years in Perth when the month of April was rainless and these happened in 1920, 1977 and 1982. There was a recording of only 1.3 mms in April of 1890. 

Monthly rainfall totals were well below the April averages in our regions north from Forbes but above average in the Riverina and northern Victoria. Echuca with 136 mms had it's wettest ever April in 138 years of records whilst Coonabarabran with 12.3 mms had it's driest April since 2005. Maximum temperatures were close to normal or a shade below, whilst minimum temperatures were about half a degree above the April normal. April last year was a few degrees above normal in our regions. The warmer than average conditions last month in SA no doubt contributed to widespread heavy rain in that state. 

There were a record number of tropical low pressures which affected the Nation during the wet season. There were 29 of them. 

Sea surface temperatures in the Tasman Sea just east of Gabo Island and Tasmania have been 3 to 4 degrees above normal perpetually since mid December and this is one factor which will enhance rainfall in the coming months in our regions. 

Some places in far north Qld around Mt. Isa had near record low minimum temperatures for April last Sunday 30th April. Mt Isa recorded 5.8 degrees a new record low. There were lower readings in early May of both 1960 and 2004. 

Warm sunny days are anticipated on most days the next fortnight after some early frosts. A few places have had their first frost for the winter last weekend.

By Peter Nelson on May 01, 2017

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