C = W*D/180
C = correction in yards
W = wind speed in mph
D = shot distance in yds
180 = magic #
Take the vertical component of the wind in mph (with or against the direction of your shot) and multiply it by the distance in yards then divide by the magic # (180) and there's your correction.
So if you're hitting a shot of 135 yds into a 19 MPH wind you get:
19*135/180= 14.25
Meaning you should add about 14 yds to your shot length - so you'd hit at 149 yds.