This Special Climate Statement from the Bureau of Meteorology details the recent unusual winter warm spell across Victoria.
A high pressure system centred over the NSW coast drifted into the Tasman Sea on the last weekend of July 2011. The high pressure system directed north westerly winds across Victoria. This northerly wind flow contributed to Victoria experiencing unprecedented warm weather for this time of year. Many early season1 heat records were set for both warmest day and warmest night following mid winter (noting that late June/early July is typically the coldest time of year in southeast Australia).