Natural gas surged Tuesday on expectations that another bout of widespread colder-than-average weather in the next two weeks would sustain high demand for the heating fuel. Natural gas for March delivery settled up 47 cents at $5.375 a million British thermal units on the New York Mercantile Exchange. Frigid weather this winter has sent natural-gas prices soaring and restored large one-day price swings to the volatile market, which has been subdued by high supplies in recent years. Tuesday’s 9.6% price gain only brought prices to their highest level since Wednesday, when futures hit a four-year high of $5.557/mmBtu. Updated weather forecasts Monday night and Tuesday called for unusually cold weather in the first two weeks of February to extend […]