Stuart Weitzman boots (current version starting in sz 4), DIY scarf, Goyard tote, J.Crew earmuffs
This has been my daily commuting uniform for the past few winters - wool coat, black boots, plus a pop of color if possible. This coat was one of my first purchases when I started working, and remains the heaviest and warmest coat I've ever tried on. It's a size 2 regular, and the only alterations needed were sleeves and raising the belt loops.
For commuting footwear, basic black boots are the most versatile for my less-than-exciting winter work attire, which usually includes dark opaque tights or dark ankle pants. It does make wearing wider trousers tough, since the tucked-in pants look is rather pirate style. I used to have rubber boots that were worn almost daily (despite their unstable little stub heels), but have since been replaced by the options below:
Stuart Weitzman boots (review) Aquatalia weatherproof boots (review) Hunter rubber boots (kids review)
I just realized that the only snow shown above is in the category intended for little to no snow. Ah well...mental disconnect aside, the "precipitation scale" above is what I use to decide on footwear each morning after checking the weather. All three of these styles are great for the cold - even though the Stuart Weitzman boots may be the thinnest, the close fit acts as a second skin and keeps sensitive kneecaps covered.
Rubber boots, as wonderfully waterproof as they are (and mighty toasty with the liner socks), feel the most clunky to me out of the three options and are therefore reserved for downpours or snowstorms. However, I've heard that Hunter's newest foldable/packable boot is much more lightweight and comfortable, and perfect for travel. Good news for those with longer calves or very small feet - the packable ones are currently available in either women's tall, or little kids up to a kids sz 3 (this = womens sz 34 or 4). As a short-calved, womens sz 5 wearer, I'll have to wait for these to come out in big kids.
I reviewed these Aquatalia boots late last year, and have nothing but praise for the brand after 3 months of wear. Their line has the look of fashion boots but the functionality of "utility" ones. I've worn these through fairly heavy sleet, slush, and salted snow and they come out looking good as new (with the occasional damp wipe clean). I've only listed them under moderate precipitation because Aquatalia mentions their boots are "weatherproof," but "zippers and fastenings are not protected against water penetration," so I wouldn't go around fully submerging them.
The style I'm wearing is currently sold out, but the Starry Weatherproof Boot option looks promising, especially for shorter legs given their 14 - 14.5" listed shaft height. Amazon has more colors, sizes, and a lower price, which Nordstrom should be willing to match. Please note the Starry calf width is listed at Nordies to be 13.5" around, but may actually be more narrow on smaller sizes. My Drew boots were listed as 13," but measure closer to 12.5" around on a size 5.5.