Originally Posted by
pstaney
I've seen in FAR 91 type flying the practice of accepting loose snow on the wing, believe it will always blow off on take off.
...and who knows what you will find under the snow.
I've done a bit of gliding and one of the planes at our club was iffy if the wings were wet. The "stall speed wings wet" was only a few k below the normal winching speed. The field bus carried several car wiper blades and some cloths to save your life with.