China's Feng Shanshan shrugged off the effects of jet lag to fire a six-under-par 66 for the clubhouse lead in the weather-disrupted opening round of the U.S. Women's Open at Trump National on Thursday.

The Olympic bronze medalist took advantage of calm morning conditions with a sizzling opening nine of five-under 31 to lead a pack that included perennial Women's Open contender Amy Yang and former world Nos. 1 Ryu So-yeon and Lydia Ko.

A heavy thundershower interrupted the afternoon wave for two-plus hours and play was called off due to failing light with 39 players needing to return early on Friday to finish.