The problem with a dual runway airport is the timing of closing a runway for snow clearing.
If you leave it until the same point at which you'd be clearing a single runway airport, it's too late as the other runway will be too contaminated by the time you get to it.
You need to close the first runway earlier than you think to enable it to be cleared and ready to operate, which in turn enables you to close the other runway before the point at which it becomes unsafe and would close anyway.
With all the time buffers you need to build in, the point at which you start thinking that you should be closing the first runway, it's already too late!
.....and of course, at an airport which is scheduled to 99% capacity, you need to set the flow rate to anticipate the first closure by an hour or so to enable the flow to kick in.
It seems more like an art than a science.
WHBM, re Russia, it's different snow. Seriously. Dry, compacted snow is nothing like the usual UK slushy snow. From my understanding, flight crews are far happier to operate from runways contaminated by dry, compacted snow than slush.