. Elementary physical geography . Fig. 48. Average Sturm tracks. Relative abundance indicated by numbers showing the total number between the years 1878 and 1887. While hurricanes are most commonly developed in theautumn, temperate latitude cyclones occur in all seasons ofthe year, but are most numerous and violent in the do not develop in tropical latitudes, but are formed invarious parts of the temperate zone. Some of them begin inthe Pacific Ocean, others start in the southwestern part ofthis country, while others are first noticed in the northwest. STORMS. 97 Their path of prog
. Elementary physical geography . Fig. 48. Average Sturm tracks. Relative abundance indicated by numbers showing the total number between the years 1878 and 1887. While hurricanes are most commonly developed in theautumn, temperate latitude cyclones occur in all seasons ofthe year, but are most numerous and violent in the do not develop in tropical latitudes, but are formed invarious parts of the temperate zone. Some of them begin inthe Pacific Ocean, others start in the southwestern part ofthis country, while others are first noticed in the northwest. STORMS. 97 Their path of progression does not show the peculiarcurving so noticeable in the tracks of hurricanes; but theirdirection is usually toward the east or northeast (Figs. 47and 49). If they begin in the Pacific or the northwest, theymove in an easterly direction across northern United Statesor southern Canada; and the center very commonly passesover the Great Lakes and down the valley of the St. Law-. Tracks of first decade of month Tracks of second decade of month .^n-TTv^TraclcB fxom_21st to 31st, inclusive *•:?^?Indicates fog belts^^s^Indicates the position in wEiehneldioaor icebergs were observed Fig. 49. Tracks of low-pressure areas (both hurricanes and temperate latitude cyclones),October, 1892. Number of the storm indicated by large figures, dates by smallfigures. reuce. If they have their beginning in the southwest (), they first move northward, then curving to the right,they pass out upon the Atlantic. The paths of the hurricanes, and nearly all of the north tem-perate latitude cyclones, converge toward the Nova Scotia-Newfoundland region, and then remain nearly parallel acrossthe Atlantic. Sometimes these storms begin in the Pacific, 98 PHYSICAL GEOGRAPHY. and pass across the United States, the Atlantic, and Europe,thus going nearly around the earth (Fig. 48). While thepath of progression is usually regular, there are many minorirre
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