Southerly is the name of a storm or front of air coming from the South. In the Southern Hemisphere these can be cold and have bad weather. In Wellington, New Zealand these storms are normally short and frequently have winds gusting between 120 km/h and 160 km/h though higher speeds are known. In Sydney, New South Wales, Australia these events are known as southerly busters.

On sunny days in the Sydney Summer, the land heats up rapidly during the morning, while sea temperatures remain cool, typically 20 to 23 degrees. The prevailing early morning wind is a light South West offshore breeze (a Catabatic wind) that blows from land to sea, but as the land heats up a North East convection wind develops. This is a typical "sea breeze". It starts shortly after sunrise on the coast and gradually pushes inland as the day proceeds, typically reaching the City by mid to late morning and the Western Suburbs by early to mid afternoon.

Frequently, a strong offsea gale develops from the South, bringing a rapid fall in temperature, and sometimes a short, violent rain/hail storm. On hot afternoons in the late nineteenth century, before the days of radio, the Sydney General Post Office (GPO) would fly a flag bearing the letters "JB" to indicate that the Southerly Buster had reached Jervis Bay, about 150 km to the South as the crow flies.

A more persistent and potentially violent Sydney NE storm is known as a "black nor'easter" . This is not a convection wind, but a storm system that develops offshore which can last several days. This is heralded by the rapid build-up of dense black cloud that can convert to a gale in well under one hour.

Sometimes, a strong cold front approaches from the South or South West, marking the boundary between hot and cool air masses. The temperature is dramatically dropped by a violent storm-laden Southerly wind, and it is this that is known as a "southerly buster".

Other articles related to "southerly":

Bickerton Hill
... Parts of the southerly hill are also known as Larkton Hill ... of an Iron Age hill fort, Maiden Castle, are located on the summit of the southerly hill they are a Scheduled Monument ... A large area of the southerly hill is protected as a Site of Special Scientific Interest (SSSI) for its biological importance much of this hill is owned by the ...
Markham—Unionville - Boundaries
... of Markham as follows commencing at the intersection of the southerly limit of the city with Ontario Highway 404 thence northerly along said highway to. 7 thence easterly along said highway to 9th Line thence southerly along said line to the southerly limit of said town thence westerly along said limit to the point of ...
Bickerton Hill - History - 20th–21st Century
... The heathland of the southerly hill went unmanaged from the 1940s until 1983, when 66 hectares (160 acres) of land were acquired by the National Trust the trust's holding was extended by 51 ... Much of the southerly hill and the western escarpment of the northerly hill were notified as two separate Sites of Special Scientific Interest in 1979 ... footpath opened in 1974 it then started in Duckington, immediately south of the southerly hill ...
Southerly (band)
... Southerly is a United States musical act, a solo project of Krist Kreuger ... on drums, and Casey Montgomery on guitar, accordion, organ and more), Southerly is set to release their new full length, Storyteller and the Gossip ...