I suspect it is the same parents that moaned about lazy teachers not making the effort to get to school.
last Friday and again today it is snowing but school was/is open. About 10 children have come in out of a class of 30. Friend's son (at different school) reported that there were only 4 in his class on Friday!
Most (over 90%) of the children at DS's school live within a 10-15 minute walk and the paths are all absolutely fine to walk along (have just walked the mile and half to work via school and witnessed no icy patches) so I don't believe that not being able to get there is a genuine excuse.
The doubly annoying thing is that because so few children are in the teachers will decree it is a day of drawing snow pictures and watching DVDs rather that whatever it was they had planned.