Taipei, Aug. 3 (CNA) Taiwan could issue a sea warning for Typhoon Dolphin as early as Friday afternoon if the storm maintains its current westward track, the Central Weather Administration (CWA) said Monday. A westward track would bring greater impacts to Taiwan from its outer circulation, while an earlier northward turn would lessen the effects. He said Dolphin is expected to remain a moderate typhoon or tropical storm while retaining a relatively large circulation. A Friday afternoon sea warning, indicating that hazardous typhoon conditions are expected in waters surrounding Taiwan within 24 hours, cannot be ruled out if the storm continues on a westward track, Lin said. If Dolphin turns northward, a sea warning may still be issued if the change in direction comes late and the storm's circulation does not shrink significantly, Lin said.