I once flew my Avistar and Magnum .46 when it was so windy the plane would not sit on the ground without rolling backwards or turning over unless the engine was running at a good fast idle. Don't know the exact wind speed but all the flags in the area were straight out, so I'm sure it was at least 25mph. Only way I could take off was to hold the plane by the tail to keep it  pointed into the wind while throttling up to take off.  Took off in about 2 feet and had no trouble flying and doing any manuevers I wanted to.
 However, landing was pretty intense and after getting lucky a couple times, I lost my nerve for landing on pavement.  I started coming in steep about 1/3 throttle, leveled off, cut throttle, made it stall about 4 feet high, and plopped down in waist high grass rather than risk smacking the pavement. Did this several times that day. 

Another day the wind was about  half as fast but more gusty and my Venus ended up in  pieces.