RETURN PERIOD IN YEARS 

 5 10 20 40 60 



^ 20.0 - 



50.0 80.0 90.0 95.0 98.0 99.0 



cunuLflrivE probability scale 



EXTREMAL TYPE I 



Figure C11. Gulf of Alaska, 12-hr averages 



RETURN PERIOO IN YEARS 

 5 10 20 40 60 100 



50.0 80.0 90.0 95.0 98.0 99.0 



CUMULATIVE PROBABILITY SCALE 



EXTREMAL TYPE I 



Figure C12. Gulf of Alaska, 15-hr averages 



C7 



