I don't think MSP has one posted right now, but the quick version is what I said before -- choose pieces that you can mix and match with each other to make different outfits (like in the article "1 Item, 3 Ways"). For example, when I was visiting family in a very wintry location over the holidays, I packed a pair of maroon skinny jeans that would go with either the ombre grey sweater or the cream cable-knit sweater, and either of those sweaters could also be paired with my short grey skirt and warm leggings. I didn't manage to get absolutely everything interchangeable, but I did manage to squeeze everything into just a carry-on. And that's including the thick sweaters and an extra pair of boots! As for the jacket, when I travel I usually bring a Gore-Tex rain jacket...not absolutely the most stylish, but it's windproof, waterproof, and breathable (very important!). That got me through southern England in December, so it should work for your temperatures if you pack gloves, a hat, and some warm layers for underneath.