Temperatures in Washington and New York were forecast to drop as much as 38 degrees as a cold front that brought snow to Chicago this week sweeps eastward with gusty winds grounding flights.
West Texas Intermediate crude fell from a five-week high on forecasts that U.S. inventories increased last week. Brent slipped as Libya prepared to resume exports from its Hariga terminal.
Spot wholesale electricity in Texas rebounded from a one-month low as below-normal temperatures boosted demand.
Gasoline futures slipped from a seven-month high as the U.S. benchmark crude retreated.
Natural gas gained for the first time in three days in New York as a shot of cold air stoked consumption of the heating fuel.
Spot wholesale electricity in Texas slid as generation from wind was above expectations.
Natural gas fell for a second day in New York on speculation that stockpiling may accelerate as milder weather reduces fuel use.
Spot wholesale electricity rose from the Midwest to Texas as power demand exceeded expectations.
U.S. nuclear-power production tumbled to the lowest level in almost a year after a New Jersey reactor unexpectedly closed, boosting total plant shutdowns for planned and unplanned work to 19.
Natural gas futures dropped in New York for the first time in four days on forecasts for an above- average stockpile gain, as milder weather reduced fuel use.