i check snotels about every three hours 2 hours after the update time, so as much about 3-4 times a day, to make sure i see all the updates, get a solid 6-7 hours on snowest a day......
Usually 3 or 4 times a day when I know its NOT snowing , hoping for a freak storm to appear out of nowhere I guess. Probably 10 times a day when snow is possible
Sad thing is, Snotel is not all, I also look at about 5-10 webcams, couple weather forecasts, and couple radars, multiple times a day each.