This CMEGroup.com webpage provides delayed Henry Hub National Gas Prices as they are trading on the NYMEX.
This CMEGroup.com webpage provides delayed prices for Light Crude as they are trading on the NYMEX.
The Ino.com website provides delayed basis swap quotes for a variety of locations and commodities.
The New York Mercantile Exchange website provides information and pricing for natural gas and a variety of other commodities.
The U.S. Energy Information Administration (EIA) provides weekly storage information every Thursday at 9:30 AM CST.
The Weather Channel provides satellite imagery for the entire U.S., as well as additional weather information, including radar images, temperature data, heat index values and the like.
Interconn's Energy values/Conversion Table (pdf | 26 kb) provides specific conversion factors between various energy and volumetric units of measurement.