High pressure north of the state is providing steady trade winds across the islands today. Windward showers are bringing clouds and light rainfall along the windward slopes. Trade winds will continue through the forecast period with an uptick in winds and showers expected Sunday through Tuesday.
High pressure moving in from the west will build north of Hawaii tonight and Sunday. The pressure gradient will tighten from N to S across the area as the high builds, and winds will increase in response. A wind advisory may be necessary across the windier areas of the Big Island and Maui county Sunday as the winds increase. Tuesday, the high will push toward the east Pacific as a weak front moves across the dateline. Winds over the state will decrease to moderate trades as the high moves into the east Pacific for the second half of the week.
Current precipitable water values are below normal near the islands and showers have been limited. The mimic precip water field shows an increase in moisture upstream of the islands near 150°W and 24°N. This moisture is expected to increase windward showers tonight through Tuesday night as the moisture moves across the area.