Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
284 FXZS60 NSTU 250045 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 144 PM SST Tue Jul 24 2025 .DISCUSSION... A trough south of the Islands is moving toward the region, while a high-pressure system builds near New Zealand. Satellite and surface observations show towering clouds producing widespread showers, prompting a Flash Flood Warning this afternoon and a Flash Flood Watch through Friday. Winds will gradually strengthen as the high-pressure system becomes dominant through the weekend. The Islands are expected to experience widespread showers and windy conditions, with a brief break in rain on Saturday as the trough shifts slighty south. Rain and winds will intensify again Sunday night as the high pressure and trough strengthens. Models indicate a higher potential for flash flooding, lasting through Tuesday. Afterward, the trough will weaken, bringing isolated rain and light winds to the region. && .Marine... Wave heights at the Aunu`u PacIOOS buoy are currently 5 to 6 feet, with calm seas expected to turn textured tonight as winds increase to 15 knots. Wave heights will continue to rise through the weekend, in line with strengthening winds. A strong south swell is forecast for Sunday, coinciding with winds reaching advisory levels of 25 knots, potentially escalating to warning levels as surf exceeds 15 feet. && .PPG WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch && $$ TM