The news anchor woman in the movie (Andrea Engel) and the Sportscaster (Shaye Ganam) are real life news anchors for a TV station in Edmonton, Alberta, where the exterior shots were filmed.
Chevy Chase complained on The Rosie O'Donnell Show (1996) that when filming in Edmonton Alberta, Canada, it was incredibly cold outside. In fact, the temperature throughout filming was +1C (34F) or higher everyday. Effects artists actually had to *make* snow for the shooting. Then mayor of Edmonton, Bill Smith, sent a letter to Rosie O'Donnell telling the truth of the matter, which she read on air and laughed off - to the annoyance of most Edmontonians.
During the snowmobile chase, Hal stops to let the two goons shoot on ahead of him. Yet in the next shot of Hal (after the two baddies separate their machines), Chet is coming up on him from behind.
Near the 45 minute mark, after the Snowplow runs into a gray Plymouth Reliant, you can clearly see a CAA (Canadian Auto Association) sticker on the trunk. When the camera cuts back to a closer angle, you can see that the sticker has been peeled off. Obviously the producers didn't want the audience noticing the CAA sticker, which would be a dead giveaway that this movie was filmed in Canada.
In the introduction, after the principal gets hit with the snowball he falls back and drops his steak into a lawn chair. In the next scene, his dog comes and picks it up from the ground.