I dont know what it could have been, it rocketed skyward at an extremely high rate of speed and looked like an up-side down tornado risI was involved in a Moose inventory study and we were flying out to the Wigwam River via helicopter. We were flying toward the Galton range and the pilot pointed out an upside down tornado rising through cloud somewhere in the mountain range. It appeared to be rising at a very high rate of speed and all that could be seen was a dark spec at the vortex tip. The pilot refered to local weather reports and there was no severe weather indicated. One of the biologists was very affraid to look at the disturbance in the air. At first we thought it must be a missle launch from somewhere and that a world war had began, afterall it was new years eve of 99/00. I dont know what it could have been, it rocketed skyward at an extremely high rate of speed and looked like an up-side down tornado rising through the cloud.