UPDATE 1-U.S. natgas futures fall over 6 pct on forecasts for warmer weather
(Adds latest prices) Feb 1 (Reuters) - U.S. natural gas futures fell over 6 percent to the lowest level in almost two weeks on Monday on forecasts for warmer weather through the middle of February that should reduce heating demand. After ending up over 5 percent on Friday, front-month gas futures on the New York Mercantile Exchange closed down 14.6 cents, or 6.4 percent, at $2.152 per million British thermal units. That was the biggest decline since late December. Gas prices for J
