Forecasts for the week around Christmas and a little after are converging on a cooler...though not cold, for much of the lower 48. This is supported by climatology and by current and forecast states of some big planetary patterns like the PNA, AO and NAO. Nearly all of Canada is snow covered which is a reverse incubator for cold air...with this in mind I stepped out on a little limb and picked up some cheap HNU January 14 and 15 calls...not a recommendation of course.