bob tillisson was riding in his snowmobile when buried by an avalanche. another group raced to his rescue using avalanche beacons to pinpoint bob's location. as they dug to remove the snow from his face dustin realized that he was rescuing his friend of 35 years. >> anybody know him? >> it's bob tillisson. >> dustin says both were unaware that either were on the mountain that day, an incredible story of survival thanks to a friend who was at the right place at the right time. >>> severe weather concerns are not letting up as we start this week. icing concerns sweep across the plains while the gulf coast is on alert for potential flash flooding. nbc meteorologist michelle grossman is tracking the wild weather impacting the country. michelle, good morning. >> it's going to be another busy week. looking at radar active already this morning. we have a big storm system in the middle of the country, heavy rain in portions of the southern plains. you can see lightning already early this morning in the middle here we have some freezing rain and we're going to see