If wintry weather is to blame for natural gas surging to multiyear highs this week , then prices should shed those gains once spring arrives, traders say. The futures market supports the theory: While front-month futures settled Thursday at $5.011 a million British thermal units, contracts for delivery in April and later months are trading below $4.40 a million BTUs. Those lower prices won’t last, argues Teri Viswanath, senior natural-gas strategist for BNP Paribas SA. The market needs to pack away an unusually large amount of natural gas this summer to replenish inventories before next winter. If prices haven’t picked up by summer, she cautions, storage tanks could end up sitting empty instead. Thanks to strong demand for gas-fueled indoor heating, U.S. natural-gas inventories sit 17% below the five-year average for this week, according to the U.S. Energy Information Administration. Natural gas is stored in depleted […]