The Energy Information Administration (EIA) has posted some interesting information on domestic natural gas storage levels:  "The increase in U.S. working natural gas inventories nearly half way through the 2012 injection season—the period from April through October when most natural gas is stored underground to help meet heating demand during the upcoming winter—was the lowest in 12 years. The slow start to the injection season reflects record-high inventories at the end of this winter, leaving less space to be filled, and a large increase in natural gas use by the U.S. electric sector for power generation. EIA estimates that, by November, working natural gas inventories will hit a record high, exceeding 3,900 billion cubic feet (Bcf)."

One of the accompanying charts.