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).
