The extreme thunderstorm that tore through Kurnell was consistent with being an mid-intensity tornado with wind gusts well above the previous strongest recorded four decades ago in NSW.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/sydney-weather-bureau-meteorology-confirms-kurnell-was-hit-tornado
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/age-australia
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-disasters
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/storms
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/australia
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cyclones