The US National Oceanic & Atmospheric Administration (NOAA) forecasts this winter will be 2.8% warmer than the 30-year norm for the US in December through February but still 1.3% cooler than last year.“La Nina is here, with a weak-to-moderate event likely to persist through the winter,” said Michael Halpert, head of forecast operations and acting deputy director of NOAA’s Climate Prediction Center.The Societe Generale Group in Paris said, “This means temperatures start off colder in December but warm up towards February. While the winter is likely to be milder than average, NOAA warned that we should expect bouts of winter weather which should add to volatility...