How do you think that airports in Canada, Scandinavia and Russia manage ? Do you believe they close down for 6 months of the year ?
Why are ski flights delayed departing from London or Manchester, but rarely from Geneva or Salzburg on the return ?
There seems to be an insistence that there is not a snowflake visible on the runway. Yet last year I made a departure as pax in a BA 747 from a Canadian airport in a blizzard. What on earth do you think manufacturers put Contaminated Runway procedures in the Flight Manual for ?