What is that you ask, well here you go !
“A black nor’easter is a persistent and potentially violent north-easterly storm that occurs on the east coast of Australia, particularly from southeastern Queensland to southern New South Wales, usually between late spring and early autumn, about two days a year (or more, depending on the intensity).
Developing offshore as a deep coastal trough, the storm is heralded by the rapid build-up of dense black cloud that brings heavy rainfall and strong northeasterly winds along the east coast of Australia. A black nor’easter can be a combination of surface troughs, onshore flow, and a low. The storm system may cool down warm days due to the persistent blanket of thick moisture-rich clouds.
Although not convection-driven, the north-east wind field leading warm moist tropical air to the subtropics and mid-latitudes can combine with a higher level cut off low from the Southern Ocean. Black nor’easters were first recorded during the 19th century and were so-named because the affiliated darkness (of the moisture-loaded clouds) can transform the day to as dark as twilight.” (wikiwand)
So we got whacked here by one from last Thursday afternoon to Saturday morning, wow it was crazy. Our station measured over 230mm in that time. We are just very lucky it has been exceptionally dry so far this year and most of the tide has receded. The image below shows the visible satellite pic from about 0725 Saturday morning. Yes it was incredibly powerful and now we really need a break but unfortunately another cold front/low pressure system will hit tomorrow afternoon. Lets hope it moves away quickly…