Natural gas skipped a thin line between gains and losses Monday as market watchers weighed moderating weather forecasts against concerns that supplies could be exceptionally low at winter’s end. Natural gas for March delivery settled down 3.8 cents, or 0.8%, to $4.905 a million British thermal units on the New York Mercantile Exchange. Unusually cold temperatures across the U.S. have boosted natural gas to record highs in recent weeks amid robust demand for gas-fueled heating in homes and offices. About half of U.S. households use natural gas as their primary heating fuel, according to the U.S. Energy Information Administration. Domestic demand for natural gas hit an all-time high in January, according to energy-analytics firm Bentek Energy, owned by McGraw Hill Financial Inc. (MHFI). […]