US natural gas futures fell for a second day to $3.15 per MMBtu on Tuesday, as Gulf Coast producers restore operations after Hurricane Isaias, while warmer weather forecasts curbed early-season heating demand. As of Monday, around 25% of natural gas output remained shut in, according to the US Marine Minerals Administration. However, the impact on overall supply was limited, as offshore production accounted for just 2% of total marketed gas output. In addition, forecasts of above-average temperatures across the eastern US from October 22-26 could delay the seasonal pickup in heating demand. Prices also declined amid weaker LNG activity, with gas flows to the nine major export plants falling to 17.4 bcfd in October from 17.9 bcfd in September. Meanwhile, Lower 48 output dropped to 110.7 bcfd this month from record highs of 113.3 bcfd in August and September, amid hurricane-related shut-ins, force majeure events and pipeline disruptions in Kentucky, Texas, West Virginia and elsewhere.