80.0 



60.0 - 



RETURN PERIOD IN YEARS 

 5 10 20 40 60 



100 



uj 20.0 - 



0.0 



50.0 80.0 90.0 95.0 98-0 S9.0 



CUMULflTIVE PROBflBILITY SCALE 



EXTREMAL TYPE I 



Figure C7. Gulf of Alaska, 3-hr averages 



80.0 



K 20.0 - 



RETURN PERIOD IN YEARS 

 5 10 20 40 60 



100 



50.0 60.0 90.0 95.0 98.0 99.0 



CUMULATIVE PROBABILITY SCALE 



EXTREMAL TYPE I 



Figure C8. Gulf of Alaska, 6-hr averages 



05 



