One of the hardest parts of long range shooting/hunting. The photo is from Norways LR CD and illustrates the wind speed in relation to flags, same principal can be used for vegetation. The wind meter I use is a Kestrol 2500.
How do others read the wind?
http://i1103.photobucket.com/albums/...agReadings.jpg
http://i1103.photobucket.com/albums/...s/IMG_0507.jpg