Natural-gas prices jumped for a second day Tuesday as weather forecasts called for temperatures that could prompt demand for gas to heat homes in some parts of the U.S. and produce electricity for air conditioning in others. Gas for June delivery rose 3.2 cents, or 0.8%, to $4.831 a million British thermal units on the New York Mercantile Exchange, the highest closing price since Feb. 26. The rally followed Monday’s 3.2% gain that was driven by strong commercial buying in the cash market as the May contract expired. Weather forecasts called for soaring temperatures in the West and across the South in the 10-day outlook beginning in May, with the thermometer topping 90 degrees Fahrenheit in Southern California and Texas. Utilities in those areas are expected to need more natural gas to cool homes. At the same time, lingering late season cool temperatures in the Midwest and Northeast were […]