
1) Former Amtrak route
Found on
https://www.crosswordclues.com/clue/south-wind
[train] The South Wind was a named passenger train equipped and operated jointly by the Pennsylvania Railroad, the Louisville and Nashville Railroad, the Atlantic Coast Line Railroad (later Seaboard Coast Line), and the Florida East Coast Railway. The South Wind began operations in December 1940, providing streamliner service between Chicag...
Found on
http://en.wikipedia.org/wiki/South_Wind_(train)

A south wind is a wind that originates in the south and blows north. Words used in English to describe the south wind are auster, buster (a violent south gale), föhn/foehn (alps), gibli (Libya with various spellings), friagem (a cold south wind blowing into Brazil from the Antarctic), khamsin (a hot spring wind in Egypt, with various spellings), ...
Found on
http://en.wikipedia.org/wiki/South_wind

[
n] - a wind from the south
Found on
http://www.webdictionary.co.uk/definition.php?query=south%20wind
souther noun a wind from the south
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.