HYDROGRAPHY OF THE MARINE WATERS 



61 



JANUARY 



FEBRUARY 



MARCH 



APRIL 



MAY 



JUNE 



JULY 



AUGUST 



SEPTEMBER 



OCTOBER 



NOVEMBER 



DECEMBER 



ANNUAL 



LEGEND 



Q % OF CALMS (0-3 MILES PER HOUR) 



— 4-15 MILES PER HOUR 



Ezza 16-31 MILES PER HOUR 



Mi 32 MILES PER HOUR AND OVER 



rj 



Fig. 26. Monthly and annual surface wind roses for Cape Hatteras showing, by the propor- 

 tionate length of a given symbol, the percentage of winds of the indicated strengths and direc- 

 tions. Data from U. S. Weather Bureau (1941), Airway Meteorological Atlas for the United States. 



