RSS Feeds
Area Forecast Discussion
Issued by NWS Pago Pago
Issued by NWS Pago Pago
000 FXZS60 NSTU 030128 AFDPPG Area Forecast Discussion National Weather Service Pago Pago AS 228 PM SST Tue Jun 2 2020 .DISCUSSION... Latest satellite imagery shows a drier air mass to the east moving into the area through the rest of the short term forecast. The 18Z GFS model run shows a broad area of high pressure to the south remaining nearly stationary tonight through the beginning of the long term forecast. With the high pressure in place for the most part of the forecast, tradewinds with embedded showers will prevail for the forecast period. This afternoon`s (00Z/03) upper air profile supports much drier conditions over the territory for the rest of the week. The high pressure to the south will eventually relax as it migrates southeast. This will likely diminish the strength of tradewinds. A low pressure system embedded within the trough oriented northwest to southeast is sandwiched between the two high pressures as it continues to move further southeast. Another stronger high pressure southwest moves into the area and this will transport tradewinds again over the area. Very briefly winds will become light and variable between the transition from the aforementioned high pressure and the latter high pressure towards the end of the long term forecast. Therefore, expect trades with embedded showers to prevail through the weekend before it diminishes to light and variable winds. Trades will pick up again by the new week. && .Marine... Combined seas of 7 to 9 feet with 7 to 8 second periods will remain across the Samoa waters through the end of the week. However, with the trades remaining over the territory, rough conditions remain for small crafts through at least Thursday. PacIOOs Aunu`u buoy reports seas within the 7 to 9 feet range with very short periods. This data places the surfs in the cautious criteria. The Wave Watch III model data shows long period swells Saturday afternoon into Sunday. Therefore, the advisory for small crafts will remain and the advisory for high surfs is cancelled. Will continue to monitor situations as the week progresses. && .PPG WATCHES/WARNINGS/ADVISORIES... A High Surf Advisory is cancelled. A Small Craft Advisory remains in effect. && $$ JTA
