If wind is so strong that using the above formula suggests that you need to raise your angle more than 90 degrees, than you can't high angle using full power to hit the target.. the shot will fly too far if you use angle 90, and if you go backwards from angle 90 the shot hooks strangely. One way to deal with this is to use angle 90 and variable levels of power. A member of the Lord guild posted a trick for dealing with vertical winds: the left column shows some typical vertical wind strengths, and the right shows how much power you need to make the shot land as if you were firing with 4 bars (full power). For example: In 0 wind, angle 81 with 4 bars travels 1 screen distance. If the wind is 15 up, you only want to use 3.4 bars to make the shot travel the exact same distance.
Wind Power 24 2.9 bars 19 3.15 bars 15 3.4 bars 10 3.65 bars 5 3.8 bars 3 3.9 bars