Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
940 FXZS60 NSTU 130025 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 125 PM SST Tue Aug 12 2025 .Short term... TONIGHT THROUGH THURSDAY NIGHT...Ridge remains south southwest of the islands. Satellite shows a shortwave trough to the east of Manu`a. This weather feature will pass north of the islands tonight and Wednesday. A low level convergence will develop over the islands on Wednesday night with the high pressure to the southwest. Trades will increase to breezy flow on Thursday as the pressure gradient deepens between the high pressure and trough up north. A shortwave trough from the east will shift winds on Thursday night to the east. .Long term... FRIDAY THROUGH TUESDAY...Numerous showers will continue on Friday morning before it passes southwest in the afternoon. Winds will also shift to the northeast. Another low level instability feature will pass over the islands and again increase showers on Saturday. A strong high pressure to the southeast will build winds to breezy trades on Sunday night and persist through Tuesday. Scattered showers will remain over the islands from Saturday night through Tuesday. && .Marine... Seas of 6 to 8 feet will subside 5 to 7 feet tonight as south swells pass the islands. Another set of southern swells will again elevate seas 6 to 8 feet on Wednesday night and Thursday. With breezy winds over the islands, rough seas will persist through Thursday night. As winds diminish on Friday, seas will also subside 5 to 7 feet through Sunday. Breezy winds are expected to return on Sunday night and this will again elevate seas 7 to 9 feet to the beginning of the new week. && .PPG WATCHES/WARNINGS/ADVISORIES... High Surf Advisory remains in effect until 10 pm tonight Small Craft Advisory remains in effect until 10 pm tonight && $$