Omega Block forming over North Atlantic

Anupper-air Omega Block is forming over West-Central North Atlantic which willenhance the deepening trough over the Eastern US over the next few days as wellas building a large semi-stationary high pressure area over a large portion ofthe North Atlantic which should allow an opportunity for great circle routes toopen up from North Europe to the US and Canada.
http://oceanweatherservices.com/blog1/2012/09/21/omega-block-forming-over-north-atlantic/