December Nymex natural gas (NGZ25) on Wednesday closed up by +0.179 (+4.10%). Dec nat-gas prices rallied sharply on Wednesday as late-November and early December US weather forecasts shifted colder across the eastern half of the country, which could boost nat-gas heating demand.  Forecaster Atmospheric G2 said Wednesday that temperatures shifted colder in the eastern two-thirds of the US later in the November 24-28 period, and forecasts shifted colder in the middle third of the country for November 29-Dec ...