The U.S. Energy Information Administration (EIA) on Thursday reported an injection of 31 Bcf into natural gas storage for the week ending Nov. 13. The result exceeded the midpoint of analysts’ bearish estimates and punctuated market concerns about weak weather demand, keeping pressure on Nymex natural gas futures.

EIA storage Nov. 13

“It was warmer than normal over the eastern two thirds” of the Lower 48 during the report period, NatGasWeather said. The forecaster’s latest outlook calls for mild temperatures across much of the country into early December and below-average heating demand.

Ahead of the EIA report, the October contract was down 15.2 cents at $2.560/MMBtu. The prompt month dropped further to around $2.549 when the EIA data was released. By 11 a.m. ET, the December contract was...