People cause the difficulties.
After a snowfall the duty crew drive around the perimeter tracks and runway and announce that it is covered with snow.
The O/C ATC drives around the perimeter track and the runway and announces that it is covered with snow.
The O/C Operations drives around the perimeter track and runway and announces that it is covered with cnow.
The Station Commander drives around the perimeter tracks and runway and announces that it is covered in snow.
Various other personnel who apparantly have an interest drive around the perimeter tracks and runway and announce that it is covered in snow.
It isn't covered in snow. It has a lot of snow but is now covered by all the ice created by vehicle tyres driving over the snow.
It took me sometime to realise that this was in fact a carefully worked out plan. Light fluffy snow is awkward to clear and when you attempt to blow it away with MRDs, or even worse the one that blew sideways, then it only forms large untidy heaps. Once you have reduced the snow to an even layer of ice this can easily be dealt with by deploying a large number of airmen with shovels.
YS