As you can clearly tell from this picture, taken after 2 hours of howling sun-blizzard, the conditions cleared right up and we could now see a whole 10 feet in front of us, instead of the previous 2 feet. So of course, we had to attempt to take off again, after the pilot removed the last tarp, which almost carried him off into the still-howling whiteness. I would have been fine with waiting a little while longer, until we could see, say maybe 50 feet in every direction, but obviously I do not possess the intrepid spirit (or the cast-iron stomach) of the typical northern pilot.