May Nymex natural gas (NGK24) on Wednesday closed up by +0.013 (+0.69%). May nat gas prices Wednesday extended this week’s rally to a 1-month high on forecasts for cool US temperatures that would boost heating demand for nat gas. However, nat-gas prices fell back from their best levels after Atmospheric G2 said forecasts are trending warmer in the eastern and western parts of the country for April 15-19. Nat-gas prices have collapsed this year, with nearest-futures (NGJ24) posting a 3-3/4 year low last Tuesday as an unusually mild winter curbed heating consumption for nat-gas and pushed invent…