stags pad

guys or gals i need someone to explain to me in laymens terms how the catabatic wind effects work,and more to the point how they determine your hunting on terraced land where to me it seems that no matter what time of the day it is sun shining or not the wind seems to buffet,one minute its in my face and the next for just a few seconds its on the back of my neck,only to hear a departing sika stag whistling his head off at my interference of his dining room!!if anyone can help me out with this wind thingy i would be most grateful...cheers kurt