Show conditions that tend to create tornadoes tho the central and southeastern parts parta of the united states have more tornadoes than any ather regions of the earth according to dr W J humphreys meteorological ph physicist y of the united states weather bureau doctor hum in a discussion of those phenomena gives a list of 26 conclusions regarding them with localities seasons and weather conditions conditi om propitious to their formation doctor humphreys records tornadoes as virtually unknown elsewhere except perhaps in southern aus aralia the waterspouts water spouts occasionally soon seen by ships in tropical seas aro are much mildor and doctor humphreys believes them probably to have a different origin the essential causes of tho destructive tive tivo american tornadoes lie doctor Humph humphreys roya concludes in interaction ter action between air currents pr produced by the much vastor castor air whirls which meteorologists call cyclones corresponding ro bly to the lows bilows of the weather map these lows move across the united states in continual succession in aadi addition audition tion there exist contrasted areas of high pressure called anticyclones anti cyclones when cyclone and anticyclone react on each other they may create doctor humphreys believes tho the conditions that make tornadoes probable from dr E E frees beeles science |