April natural gas prices began the week with a lower open Sunday. The market might have come under added pressure following data from the National Weather Service that estimated US heat-related demand for natural gas to run about 18% below normal in the coming week. The exceptionally warm US winter has been a key force in restricting heat-related demand for natural gas, at the same time that record production has boosted storage levels to a more than 38% surplus compared to the five-year average. The Commitments of Traders Futures and Options report as of February 14th showed non-commercial traders were net short 126,398 contracts, a decrease of 1,314. Non-commercial and non-reportable traders combined held a net short position of 100,948 contracts, an increase of 1,017 in their net short positioning.