Durations of events meeting the above criterion are depicted by SOLID 

 lines and refer to the TOP SCALE of each graph. 



Intervals between events are depicted by DASHED lines and refer to the 

 BOTTOM SCALE of each graph. 



JANUARY 



FEBRUARY 



MARCH 



APRIL 



JUNE 



JULY 



AUGUST 



INSUFFICIENT 

 DATA 



INSUFFICIENT 

 DATA 



SEPTEMBER 



OCTOBER 



NOVEMBER 



DECEMBER 



Figure 3 1 . Wind speed persistence graph for the central northeast Pacific for Ocean Weather Station N 

 giving percent frequency of duration and interval between 17 m/sec or greater winds. (1 knot «» 0.5 

 m/sec) (Reproduced from Naval Weather Service, Ref. 27). 



64 



