what is a blocking anticyclone
2.1.1 Blocking highs. Anticyclones tutorial-blocking highs. Areas of high pressure can sometimes be very slow moving, almost stationary. Such a region of slow moving air can prevent other, faster moving pressure systems from moving into a region.For this reason they are known as blocking highs or blocking anticyclones..1.1 Blocking highs. Anticyclones tutorial-blocking highs. Areas of high pressure can sometimes be very slow moving, almost stationary. Such a region of slow moving air can prevent other, faster moving pressure systems from moving into a region.