In the winter of 2013-2014, propane was in short supply and prices went through the roof, particularly in the Midwest and northeast where it’s used extensively (see Northeast Propane Shortage – Andrew Cuomo Partially to Blame). My, what a difference two years makes. The U.S. Energy Information Administration (EIA) is out with an article today pointing out that propane inventories are now at an all-time high, mostly due to an increase in shale drilling…