Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
453 FXZS60 NSTU 230102 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 202 PM SST Sun Jun 22 2025 .Discussion... Shower activity in the area is decreasing despite an unstable upper air sounding. Models suggest the atmosphere will become more stable tonight through Monday due to easterly trades. Satellite data shows fair weather cumulus upstream, but moisture in the trade wind flow is possible. A jet stream building in the upper levels Monday night, may increase moisture and instability, extending towards the surface by midweek. This coincides with a trough developing in the area Tuesday night, which may enhance the potential for flash flooding while decreasing windspeeds to a gentle breeze. Models consistently predict this scenario for the long term, so our confidence in inclement weather Tuesday night through Friday continues to grow. && .Marine... Wave heights observed at the Aunu`u PacIOOS buoy continues to subside, falling below 10 feet feet since this morning. Peak periods have also dropped from 14 seconds to 9 seconds, showing no swells currently impacting the area. This prompted the cancellation for our high surf advisory earlier today. Meanwhile, a small craft advisory remains in effect as winds are still near 20 knots and waves greater than 8 feet. As winds gradually weaken through the week, seas are expected to follow this subsiding trend, possibly dropping below advisory levels on Wednesday. && .PPG WATCHES/WARNINGS/ADVISORIES... Small Craft Advisory && $$ TM