Wednesday 22nd NOVEMBER 2017 Pm.
TONIGHT AND TOMORROW:
Latest satellite imageries of this afternoon shows few low-level clouds streaming Northeastward over the islands along the Northeast windflow while a trough of low pressure lies to the South of the group. An upper-level ridge lies just south of the group directing a strong South-westerly winds aloft and some upper-level moisture over the islands. Sounding profile is dry and is unstable. Observations with wind profiler indicated a dominant Easterly windflow prevailing over the islands. Global models predicted the aforementioned trough to the South to drift over the islands as it weakens. Therefore, expect cloudy conditions with some isolated showers with brief moderate falls and thunderstorms possible.
THURSDAY THROUGH WEDNesday:
The aforementioned trough will remain nearly stationary just Southwards of the islands and is expected to re-materialize by Thursday evening with a weak low to develop by Friday evening and may provide some showery activities. A ridge of high pressure will push the aforementioned trough with a convergence zone Southwards. A speed convergence along this ridge will again provide some showery activities for Monday. And another convergence zone associated with a trough to the Northeast will descend over the islands with isolated to scattered showers and moderate to heavy falls by Wednesday into Thursday.
Aunu’u wave buoy recorded swells at a range of 4-6 feet early this afternoon. Global models predicted these swells to remain below within this outlook period.