By contrast, the continental high pressure system situated over the Eurasian continent counteracts the maritime influences, occasionally causing severe winters and high temperatures in the summer.
2.
When the jet stream lies north of the British Isles then continental high pressure is able to move in; when it lies across or south of the British Isles, Arctic air and Atlantic weather systems predominate.
3.
A warm, moist Mediterranean cyclone began to move ( unusually ? ) northwards over France, against a cold continental high pressure ridge, causing the cyclone to discharge its moisture as snow over large areas of western Europe.