ANNDAL AVERAGE 



PERCENTAGE SCALE 

 10 20 30 «0 50 



0.0 4.0 8.0 15 22 mph 



DATA BASED ON OBSERVATIONS 

 COLLECTED DURING THE PERIOD 

 I JULY 1972 TO 28' DEC 1978 

 (VALUE IN CENTER IS PERCENT CALM) 



Figure 13. Wind roses at Sea Crest, North Carolina. 









St 



ondord Dewiot 



on 









^ 



m 



irr^ 





/ 



Annu 



r 



ol M 



ean 



• 





.' 



^1. 









.'—^ 



Mor 



thiy 



Meon 



-- 



--.., 





_,. 



Stondord Deviation 

 ^■Z Annuo! IVIeon 



Montlily Mean 

 J I I L 



Jon. Mar. May July Sept. Nov. 



Figure 14. Seasonal variation in mean significant wave height and 

 mean peak spectral period (from the CERC wave gage at 

 Nags Head, North Carolina). 



38 



