U.S. natgas futures jump 5 pct on forecasts for colder weather

Jan 29 (Reuters) - U.S. natural gas futures climbed up 5 percent early Friday in a short covering rally on forecasts for colder weather through the middle of February that should boost heating demand. After trading within a few cents of unchanged for eight days in a row, front-month gas futures on the New York Mercantile Exchange rose 10.9 cents to $2.291 per million British thermal units at 9:15 a.m. EST (1415 GMT). That put the front month on track to rise 7 percent this week, putting