U.S. natural gas prices surged on Tuesday, with a combination of declining domestic output and an improving demand outlook helping the gas market break past prior downward pressure from seasonal maintenance. Henry Hub, the primary benchmark price for the North American natural gas market, spot gas prices jumped 5.1% to trade at 3.06/MMBtu in Tuesday’s mid-day session, with gas prices now trading nearly 16% higher over the past month. Average gas output in the U.S. Lower 48 states slipped to 109.2 billion cubic feet per day (bcfd), with energy…