Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
990 FXZS60 NSTU 300106 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 206 PM SST Sat Jun 29 2024 .DISCUSSION... The latest satellite imageries show clusters of thunderstorms just south of Upolu and another just to the north of the territory. Instability in the atmosphere is also shown on the upper air observations from this afternoon; moisture lingering in the atmosphere over the area. Model solutions project the aforementioned thunderstorms to move closer and over the territory by late tonight through at least Monday. The thunderstorms to the south are associated with a trough line to the south, increasing the potential for flash flooding and gusty winds for tonight through at least late Sunday. Once the high pressure further south exits the region to the east, the unstable line with the embedded thunderstorms to the north will descend over the islands. Expect moderate to fresh easterlies peaking at a strong breeze on Tuesday night through early Thursday. Easterlies will decrease to a gentle breeze on Fridy and the rest of the forecast period. Therefore, expect numerous showers for tonight through at least Sunday night, scattered for the rest of the forecast period. && .Marine... Combined seas have remained around 6 to 8 feet wave heights throughout the day. Hence, the cancellation for the high surf advisory and kept the small craft advisory. Model data, however, show seas of 7 to 9 feet rebuilding to the advisory thresholds for small crafts and possibly high surfs. Models are showing that this swell will generate higher surfs and strong rip currents. Also, moderate to fresh easterlies will prevail peaking at a strong breeze from time to time during this forecast period. Thunderstorms embedded within the easterlies are also possible, and may enhance seas and surfs nearby. && .PPG WATCHES/WARNINGS/ADVISORIES... High Surf Advisory is cancelled Small Craft Advisory && $$ JTAllen