I pushed a new development version of my EIAdata package to github. The main addition is a function 'wngsr' which will pull the latest Weekly Natural Gas Storage Report from the EIA. Instructions on how to install the development version are in the README file.
Below is an hourly chart of the March/April 2015 NG Calendar Spread. It is at the contract lows with some below average weather coming this week.
The March (NGH5) minus April (NGJ5) 2015 calendar spread (aka the Widowmaker) is back down to $0.20. A hourly chart is below. It looks like a good time to buy the spread, and wait for cold weather.