High pressure over the north Atlantic
For the end of the week, the European model predicts a strong Atlantic ridge in the North Atlantic where we see more frequently low pressure fields.
At 500hPa level, high geopotential of warm air should form a hot bubble with a typical omega ( Ω ) blocking between 2 cut-off-lows. Block (meteorology)
The eastern side of the ridge should bring cold air from the polar region over northwestern Europe.
Geopotential isolines and temperature at 500hPa - Customized colors
This type of meridian air movements (warm air on the western side of the ridge and cold air on the eastern side) should continue next week. It is a normal process of exchanging air masses between tropical and polar regions.
The weather is completely different from what we have experienced during the mild last winter in Europe, with a strong west-east flow linked to a very concentrated polar vortex. This one is currently more destructured, causing these anomalies.
On Sunday, most of weather models forecast a strong anticyclone between Ireland and Iceland, with more than 1050 hPa which is quite unusual in this area.
Pressure amsl - Sunday March 29 - Customized colors