Oh dear, this discussion brings back memories of being stuck in an un- named field in Tasmania whilst the captain refused to taxi as a few puddles had a very thin layer of ice, we had to wait till mid morning for it to ice melt, in the mean time a local flight school flew circuits against a clear blue sky, whilst I hid in a crew room! Looking out the window right now it snowing like hell, we just landed with no problems, welcome to Canada!