Natural-gas futures ticked higher Friday, as traders covered bets on lower prices a day after a bigger-than-expected increase in domestic-gas inventories. Natural gas for September delivery rose 0.8 cent, or 0.3%, to recently trade at $3.395 a million British thermal units on the New York Mercantile Exchange
Natural-gas futures ticked higher Friday, as traders covered bets on lower prices a day after a bigger-than-expected increase in domestic-gas inventories.

Natural gas for September delivery rose 0.8 cent, or 0.3%, to recently trade at $3.395 a million British thermal units on the New York Mercantile Exchange.

Prices often bounce back slightly after a sharp decline. On Thursday, natural-gas futures fell to a five-month low after the U.S. Energy Information Administration said 59 billion cubic feet of gas were added to storage in the week ended July 26, higher than expectations.

"Some market participants took profits by covering their short positions," said Carsten Fritsch, analyst at Commerzbank in Frankfurt.

But prices are expected to remain at depressed levels in the absence of hurricane activity, which raises the risk of supply disruptions, and expectations for mild weather in the summer.

Milder temperatures in the summer typically lowers demand for natural gas, as homes and businesses curb air-conditioning use, reducing utilities' need for gas-fired electricity. "Unless we get warmer weather there is little chance that prices will show a strong recovery," Mr. Fritsch said.

Below-normal temperatures are projected to continue across highly populated gas-consuming regions such as the Plains, Midwest and East Coast for the next two weeks. "The forecast continues to strongly favor persistence, keeping a cool pattern in place through most of the Eastern half," said private forecaster MDA in its 11-15 day forecast Friday.

Market watchers see these conditions translating into a build in gas inventories until the end of August. "The market focus is now largely placed on additional stronger-than-normal storage increases that now appear assured within the next three EIA releases," Jim Ritterbusch, head of trading advisory firm Ritterbusch & Associates, said in a note.

Natural gas for next-day delivery at the benchmark Henry Hub in Louisiana recently traded at $3.41/MMBtu, according to IntercontinentalExchange, compared with Thursday's average of $3.4355/MMBtu. Natural gas for next-day delivery at Transcontinental Zone 6 in New York traded at $3.30/MMBtu, down from $3.3985/MMBtu.