KIAWAH ISLAND, South Carolina, Aug 10 (Reuters) - Gusty seawinds rose on Friday at the PGA Championship to pose a trickytest for the second-round field at the final major of theseason. Sweden's Carl Pettersson, who shot a six-under-par 66 in theopening round is not due to tee-off until 1800 GMT (1400 local)and he will be hoping the winds have died down for the latergroups. But Pettersson and other early leaders, including NorthernIreland's Rory McIlroy who shot a five-under 67 on Thursday,could face delays with rain and possibly thunderstorms on theway. ... More...