Generally a north or east quadrant wind signifies you are fishing post frontal which is always tougher fishing than prefrontal or during stationary frontal conditions. This is because our weather patterns generally travel from west to east here in the northern hemisphere. An exception to this would be like when we have the remnants of a tropical storm traveling north from the Gulf of Mexico and it passes just to the east of you....in this case the barometric pressure would be falling with a north or east quadrant wind and the fishing can be very good if you can stand the high wind etc...lol.

Of course there are exceptions to every rule and I am sure we have all at one time or another caught some very active fish after a frontal passage..but it certainly is not the norm.