October Nymex natural gas (NGV25) on Monday closed up +0.102 (+3.47%). Oct nat-gas prices rallied sharply on Monday as forecasts for hotter US weather should boost nat-gas demand from electricity providers to power increased air conditioning usage.  On Monday, forecaster Vaisala said forecasts shifted warmer in the West to the Midwest for September 20-24, with above-normal temperatures expected across most of the US for September 25-29. More News from Barchart `````````` Higher US nat-ga ...