Scientists and students from across the country will converge along the shores of Lake Ontario during December 2013 and January 2014 to understand better the atmospheric conditions and controlling mechanisms responsible for extreme snow conditions across the region each winter.  The project is called OWLeS (Ontario Winter Lake-effect Systems), and will utilize a network of specialized weather instruments, including an instrumented research aircraft, three Doppler on Wheels (DOW) mobile radars, several weather balloon sounding systems, a vertically pointing radar wind profiler, and other instrumentation to study the interior working of lake-effect snow storms in unprecedented detail.