OK kid's...reality's here
15 inches, 20 inches, 6 feet ...whatever. The North Pole is a desert, less than eight inches of precipitation a year...think there's blizzard's there? bet your *** there's a reasonable facsimile to theme.
Shelter first, fire second. See at the end of that last sentence? That's a period. What keeps a fire burning once it starts burning? Fuel and oxygen. Warm air moves up, cold air moves down (remember WE's chimney adventure?) If you build a fire outside in the cold and you are exposed at all (no wind protection) that fire will help you freeze to death. It's going to suck cold air in from all around itself, you'll get colder and add fuel to the fire..which will make it suck more cold air in. You're between the cold air and the fire and most of the heat generated is moving....straight up.
Also bear in mind what was said about the real weather conditions, it is f****ng difficult to get a fire going in blizzard conditions. You guys have been discussing one of the potentially most fatal survival situations. When you're eyes are starting to ice shut and your hand is trembling badly enough to put out the match or whatever you're lighting with. There's good advice here, and in reality, you do the best you can, but remember it looks way easy on the forum, not so much out in the bush.
Two most important things I can think of right now to watch for in the outdoors in sub-Arctic or Northern temperate conditions.
1. Sundogs...it looks like a little tiny slice of rainbow on each side of the sun or a little tiny copy of the sun on each side of the sun. Temperatures are going to go down. I remember once working in northern Saskatchewan and temps were in the minus 30's and 40's. I saw sundogs and thought "Oh he**, how much colder can it get?" Shouldn't have asked, -55 the next morning.
2. Heavy, slow moving gunmetal grey clouds, sudden change in wind (direction and or speed) and barometric pressure. Blizzard's coming, stay indoors.