I haven't had enough precipitation in the last 10 years to make the pipes kick into siphon mode during the winter freeze. I have no reason to think that it wouldn't work during the winter freeze, we just haven't had enough rain to make it go into siphon during winter freeze. I have seen 6 inches of snow weigh down the ice covering my pond push some water out the drainage pipes, just not enough to make it go into siphon mode.
