Area Forecast Discussion

Discussion

A line of convective clouds just south of the Samoa Island chain is visible on satellite imagery. This feature is associated with a trough that will be monitored over the next few days. Additionally, the upper air sounding from this afternoon depicts a moist surface to mid-level profile, suggesting a build up of moisture as the trough moves nearby. Expect numerous showers and light winds to persist through Monday morning as the trough lingers over the area. However, the potential for flash flooding remains low, as the system appears to be a weak.

A high pressure system building near New Zealand will bring south- southeast trade winds back to the territory Monday night. Although the aforementioned trough is forecast to move further north, moisture associated with it could extend over the territory, maintaining numerous showers through Wednesday night. Breezy conditions are also expected during this timeframe and will persist until Friday as the high pressure system moves farther east. East winds of 10 to 15 mph with scattered showers are expected thereafter.

Marine

Latest wave heights observed at the PacIOOS buoy remain within advisory thresholds (near 8 feet). Peak periods of up to 15 seconds from a south swell are also being observed, suggesting high surf and strong rip currents for south-facing shores. Expect these conditions to persist through tonight, before gradually diminishing. Ideal ocean conditions are expected from Sunday through Monday as winds and swell subside. However, strengthening trade winds Monday night are forecast to elevate seas once again. Expect rough ocean conditions to persist through the end of the forecast period.

PPG WATCHES / WARNINGS / ADVISORIES

High Surf Advisory Small Craft Advisory