Synopsis: A vigorous surface trough and possible elongated area of low pressure will move over coastal waters surrounding Maui County and Oahu Wednesday, as a broad surface low meanders northeast of the islands. Expect moderate easterly winds to develop north of the trough and southeast to south winds to form south of the trough. Close to the trough, these winds could become locally strong, especially if a surface low deepens near the islands, and a Small Craft Advisory (SCA) is in place for waters around Maui County and Oahu through Wednesday. In addition, strong thunderstorms along the trough could produce erratic wind gusts in excess of gale force.
The trough and possible low will weaken near the Big Island Thursday, allowing ridging to the north to drive moderate to fresh easterly winds over most waters and southerly winds near Big Island. The trough will move south of Big Island Friday, and moderate to locally fresh trades will prevail Friday night and Saturday. Stronger northeast winds may develop on Sunday and require a SCA.
North and East Shores: Variable winds with strong gusts around thunderstorms
South and West shores: Variable winds with strong gusts around thunderstorms