A weather phenomenon known as El Nino is set to bring significant snowfall and harsh temperatures to Herts and Essex next winter.Australian forecasters say the eastern Pacific is in the early stages of a "substantial" El Nino cycle.An El Nino starts when winds near Asia and Australia peter out, causing warm Pacific waters to move east towards South America.The phenomenon, which occurs every two to seven years, drives unusual weather extremes around the world.The last strong El Nino, in...
