US energy regulators will pay attention to natural gas supply issues in Southern California and New England this winter. : Oct 20 (Reuters) - U.S. energy regulators will pay attention to natural gas supply issues in Southern California and New England this winter, but overall they do not see major factors that would lead to significant market disruptions. "Natural gas markets are entering this winter with a strong storage base and an expanding pipeline network that is delivering more supply to local markets and beyond," the U.S. Federal Energy Regulatory Commission's Office of Enforcement said in a report on Thursday.