31. In the Kalahari, there are two main mechanisms of atmospheric circulation, dominated by the Kalahari High anticyclone : 32. Anticyclones often bring days of settled weather in summer, or clear cold conditions in winter with severe frost.33. Cyclones rotate counter clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere and anticyclones do the opposite. 34. While over land, a surface circulation developed near outflow, instead of an anticyclone as found in tropical cyclones. 35. Encountering the anticyclone situated off of the Mid-Atlantic states, Helene began to curve slightly towards the west. 36. One unusual aspect of the F5 cyclonic tornado and F3 anticyclone tornado was the simultaneous right turn made by each. 37. The strongest of the anticyclones , the one situated over Siberia, registered a maximum high pressure of 1040 millibars. 38. In Marcus'simulations, the cyclones weaken, eventually allowing the anticyclones to merge, as the White Ovals did. 39. In winter the Danubian Plain falls under the influence of the Eastern European anticyclone , which brings cold Arctic air masses. 40. The mild conditions were the result of a moderate anticyclone over the region that deteriorated as the nor'easter approached.
