textproduct: WSO Pago Pago

DISCUSSION

Mostly cloudy skies with scattered to numerous showers was observed throughout the day. These conditions are supported by the latest satellite imageries and the upper air observations (RAOB) from this afternoon (31/00Z). A conditionally stable atmospheric profile conducive of potential instability within the next couple of hours is likely. Model data show the trough lingering in the area, as a ridge to the east-northeast continues to build. More showers and possible thunderstorms is expected for tonight through Tuesday. By midweek, the aforementioned ridge will dominate weather patterns for the rest of the forecast period.

Therefore, expect numerous to widespread showers with a moderate north-northwest wind to remain for tonight through Tuesday night. Showers will decrease to isolated and scattered, as winds become light and variable on Wednesday through the end of the forecast period.

Marine

Observations from the PacIOOS buoys show a downward trend of seas in the area. Seas of 7 to 9 feet is gradually subsiding to more favorable conditions. However, with the trough lingering over the area, thunderstorms embedded will likely elevate seas and winds nearby for tonight and Tuesday, before subsiding further through at least Friday. By Friday night, model data shows a large south swell moving into the area, potentially building seas and surfs for this time frame. Thus, the advisory for small crafts will remain in effect through Tuesday, while the advisory for high surfs will likely be cancelled by tonight.

PPG WATCHES/WARNINGS/ADVISORIES

High Surf Advisory Small Craft Advisory Flood Watch