TUESDAY 25th SEPTEMBER 2018 (PM SHIFT)
TONIGHT AND TOMORROW:
A high pressure system far Southeast continues to direct moderate Easterly wind flow over the Islands. An upper convergence near the forecast zone will suppress the development of any convective activities within the nowcast period. South-westerly winds aloft provides dry air and support stable weather condition for Samoa. As a result, expect fine and cool breeze apart from brief showers in some areas.
THURSDAY TOWARDS MONDAY:
A convergence zone analysed Northeast is predicted to descend over the Islands as well as the tail-end of a cold front which will sweep over in the Southern portion of the forecast zone by early Thursday morning. This will provide showery activities in the early part of the outlook period towards the weekend. A surface high pressure system further Southwest will migrate Eastward providing fresh trades in the latter part of the outlook. Expect numerous showers due to an upper trough moving from West at the same time.
MARINE OBSERVATION & OUTLOOK
Wave heights diminished in a range of 1-2m (5-7ft). For the rest of the outlook period wave activities will remain below the advisory threshold.
ADVISORIES & WARNINGS