Lugged bag back out to street display, biked home, got backpack, came back, bought, strapped bloody great thing to carrier, and walked two blocks to the good coffee place for some good beans. By this time flurries were coming down rather heavily. Got coffee, headed gingerly out into the white, got halfway home and realized, simultaneously, that it was too slippery to bike safely and I had a bare 40 minutes to make it to acupuncture. On dry streets that's a doddle: can do it in half the time; on ice trail streets with a 22 lb load it's suicide. Biked down to subway, locked bike, and then took a cab, because 30 minutes isn't long enough to get anywhere by the Dufferin bus. And all for the lack of a backpack in good time.
Of course, two blocks south of Bloor, roads were bare and dry. A very localized snow storm, that.