Going with 21"
forgotten yardstick in backyard was @ 30", but slightly slanted from the wind (lol). Also started at 7" from previous depth.
ESandwich Coop was 18", but my locale was in the death band eastern fringes more frequently. 8-10 miles to my west and north had close to 30". Forestdale reported over 20", to my SE.
Depth and drifts with this well exceed Jan 22. I feel confident in my estimate within 1 or 2"
Although a bit disappointed I missed out on the extra 9-10" by only a few miles, still a top 5'er personally