This excerpt taken from the VLG 10-K filed Sep 28, 2006.
Because the distribution and sale of propane is weather-related, changes in the weather could adversely affect our revenues.
Much of the distribution and sale of propane is seasonal in nature and sensitive to variations in weather, with consumption as a heating fuel peaking sharply in winter months. Sales of propane may be negatively impacted during periods of warm weather, and sustained periods of weather conditions inconsistent with normal weather patterns can create volatility in our earnings. Significantly warmer weather could decrease the demand for propane and have a material adverse effect on our business, results of operations and financial condition.