Upper-Level Block shunts storm tracks northward away UK

The upper-level Omega Block is re-establishing over the northeastern North Atlantic with a semi-stationary upper cut-off low situated south of the Azores for the next several days which will shunt low tracks N-NE towards Greenland and Iceland and away from the UK and Northwest Europe. 

Omega Block over the northeastern North Atlantic

NOAA OPC 72 hour Surface Forecast


The Omega block is an upper-air pattern where the strong wind belt looks like the Greek letter Omega  Ω .  

The Omega block is  often associated with two cut-off lows with one blocking high sandwiched between them.  Storm tracks will be diverted northward instead of eastward with semi-stationary surface lows situated to the southwest and southeast of the block (in the northern hemisphere).

About Fred Pickhardt

I am a marine meteorologist and sailed briefly with American Export Lines in the Far East trade after graduating from State University of New York Maritime College. I have extensive experience in weather analysis, weather forecasting, optimum ship routing, vessel performance evaluations and forensic weather event reconstructions. I founded Ocean Weather Services and as Owner and Chief Consultant currently provide optimum ship routing services and forensic marine weather reports to the maritime industry.
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