Genghis9
Captain
United States
Offline
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Woulda Coulda Shoulda
YES...it is entirely possible that you can have different wind readings at 200'AGL than at the surface. Having flown many approaches with wind shear, I've not only seen it I've experienced it. You can either see variations in wind direction or speed or both. As nearly everyone above has noted, wind observations can be effected by terrain, structures, and the environment. You are flying a high performance UAV that can go places your dad's toy could not. This is why you have to check wx/environmental factors before every mission and for the zones and altitudes you may be operating in. You should also take in to account how terrain, forestation, and structures can impact your flight ops. For example, taking off from a field that is in a bowl terrain wise that is surrounded by trees, while taking off you could experience dead calm but as soon as you clear the trees you could hit a 15 kt wind. Also, flying on the lee side of a mountain or ridge line you might experience turbulence or rapidly changing winds and speeds, while on the upwind side you could get significant updrafts.
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