"grilling turkey in winter"
billhemingway, YouTube (December 26, 2009)
"20lb. turkey grilled in 20 degree weather in 3 1/2 hours using 2 kettles"
This is definitely an amateur video: with some pretty good advice.
It's a charcoal grill, rigged with a double lid and double kettle. My guess is that it's 20° above zero, Fahrenheit - but the narrator doesn't say.
He does say - and shows - what he's doing.
Brief, informative - it's not the ultimate how-2 video, but it's pretty good.
And: it's nice to see I'm not the only one who grills when there's snow on the ground.
Not that I did today. We'll see about tomorrow.