1634 ET - U.S. natural gas futures rise sharply as TC Energy declared force majeure on a pipeline in West Virginia after detecting a leak. Nymex natural gas rose 9.1% to $3.297/mmBtu, its biggest single-day gain since January and highest close in three months. The outage affects an estimated 1.8 Bcf/d of natural gas from Appalachia. Prices were also supported by a sixth straight below-average storage build that reduced the inventory surplus over the five-year average to 95 Bcf from 118 Bcf.