Sure you need to go to....
C:\Program Files\Ubisoft\SilentHunterIII\data\Submarine\***** **
where it says "******" find the uboat type folder
for the boat your using. open it and open the cfg. file.
look for this line.
StormConditions=11,0.4;max wind speed [m/s], max rain intensity [0,1]
to read this right the first two numbers are the wind and rain intensity
settings the rest is the explanation of ranges of settings after
the semi colon.
rain can keep you off deck too but you dont notice until youve reset
the wind.
Good Hunting
M