FORECAST DISCUSSION

FRIDAY 17th SEPTEMBER 2021 (PM)

TONIGHT & TOMORROW:

Windy weather conditions remain persistent throughout the day as the high pressure system to the southeast of Southern Cooks maintain moderate to fresh easterly wind flow over Samoa.  A stable and dry atmospheric profile through the level signified the dominance of the synoptic weather features across the Southwest Pacific. Yet, few low level clouds streaming along the flow may cause brief showers with gusty wind periods within the now-cast period. Therefore, expect partly cloudy skies with brief showers and a chance of gusty wind.

SUNDAY THROUGH THURSDAY:

A trough of low pressure is predicted by the models to locate just SSW of the islands with fewer rainfall activities. However, there is an upper low that is expected to develop within the forecast zone corresponding to the time movement of the surface system. As the mentioned system may relocate further west of the group; the easterlies may then dominate over the group with less showery activities for the remainder of the outlook period.

MARINE OBSERVATION & OUTLOOK:

A moderate to fresh Easterly wind-flow with associated high swells of more than 2.5metres impacted Samoa due to an intense high pressure to the southeast of Southern Cooks. These conditions are expected to persist for tonight and tomorrow across the island. Hence, the marine advisory will remain valid for all marine waters of Samoa.

WARNINGS AND ADVISORIES:

MARINE ADVISORY – ALL MARINE WATERS.

DUTY FORECASTERS:

M. Auvae & T. Aroni