New York 



SURFACE ISOTHERMS -°C 



Baltimore '-J 



.lOOfms 



Norfolk 



Cape Hatteras J 



40''N 



35° 



30° 



25°N 



Figure 53. 



80°W 75° 



Monthly surface isotherm chart, 15, 17, 18 October 1974 



70°w 



57 



