ScienceDaily: A new Montana State University study says that weather, especially in late winter and early spring, is getting warmer in northwestern North America. The research, published in the January issue of Climatic Change, found that the coldest daily temperatures recorded in Bozeman, Mont., and Coldstream, British Columbia, have occurred less often over the past several decades. Extreme cold nighttime temperatures have become less frequent, and extreme warm nighttime temperatures have become …