Unusually cold weather has caused US NG prices to reach $4.41/MBTU, a 2.5-year high: http://online.wsj.com/news/articles/SB10001424052702304202204579254653460013492 This year, wintry weather arrived early, with arctic air sweeping into the Midwest and Northeast—the two main regions that rely on gas for heating—before Thanksgiving. Heating degree days, a measure of demand that rises when temperatures are colder, reached their highest level for November since 2000… …Supplies have been further stretched as the chill froze equipment in gas fields across Texas and other states, limiting production.