Instead of the cape (one use, $$$), I've just ordered an Outback Low Duster from Cabelas. Third outback style duster I've owned. It can get pretty cold here and I just vary the sweater/vest/polartec combination.
If it's too cold for that, it's probably too cold to go out, kilted or not.

btw: the UK/Alaska bit, you forgot the Gulf Stream effect, which is fading fast with the ice cap melting but, hey, we're stylin'.