Sorry 57" was on the wrong chart - for British Columbia - my bad - you are correct - with around 20" and this is a combination of snow and rainfall - we don't get snow here :)
Central Alberta
Annual average snowfall
Days Place-----------------------------Inches -----Centimetres
64 Banff------------------------------75.2 -----191.0
54 Calgary---------------------------50.7 -----128.8
42 Camrose-------------------------44.7 ------113.5
52 Edmonton---------------------- 48.6 ------123.5
55 Edson-----------------------------63.1 ------160.2
50 Jasper ---------------------------47.3 ------120.0
52 Lloydminster -----------------38.6 ------98.1
37 Red Deer -----------------------41.7 ------105.9
58 Rocky Mountain House ---65.0 ------165.1
That is correct. We get about 20" a year which includes snow (when it melts equivalent). the chart you listed here is snow fall. Looks about right as we get about two feet of snow a year. More this year! Ridiculous amount of snow this year and we are not even done yet!