SURFACE ISOTHERMS -°C 



Baltimore 



Charlesto 



40'N 



50' 



Cape Hatteras J ,,, ,^^ 



— 35° 



30* 



— Zb'U 



Figure 23. 



ecw 75° 



Monthly surface isotherm chart, 18-21 April 1972 



70°W 



27 



