richard engel, appreciate you. to our other big story, more ugly and wintry weather hitting out west, especially in arizona where the white mountains are in whiteout conditions. forecasters say minnesota, colorado, new mexico are also in the path of this subfreezing front. nbc has the latest on the toll that it's taken so far. >> reporter: craig, this storm has claimed at least four lives so far. two motorists were killed in minnesota. one in nevada. a snowboarder was found dead here in lake tahoe thursday morning. but in addition to those tragedies, this system is just wreaking havoc throughout the west and midwest. colorado really getting hit hard right now. the denver area hasn't seen much snow so far this season. that's all changing. they're expecting as much as ten inches to fall in the denver, colorado, area. and they also had to cancel several flights at the international airport there in anticipation of these treacherous conditions.