The 2014 Commonwealth Games silver medallist improved her English record to 65.10 metres at the New South Wales Championships in Sydney.
It puts her second in the all-time British list behind Scotland's Margaret Ritchie, who threw 67.48.
It is the second time she has thrown an Olympic qualifying mark in three days.
The 28-year-old threw 64.22m at the Auckland Track Challenge on Thursday.
Jade Lally has produced the longest discus throw by a British woman since 1983 to move to fourth in the 2016 world rankings.