Subseasonal Weather Outlook and Review

Drier conditions are predicted over much of the southern Maritime Continent in Week 1 (11 – 17 December), extending eastwards in Week 2 (18 – 24 December). Drier conditions are also predicted over parts of the northeastern Maritime Continent and eastern coast of Mainland Southeast Asia in Week 1.

Wetter conditions are predicted over parts of the western Maritime continent in Week 1 (11 – 17 December), extending eastwards to Borneo in Week 2 (18 – 24 December).

Warmer than usual temperature is predicted over much of the northern ASEAN region in Week 1 (11 – 17 December) and over most of the Maritime Continent during the next fortnight (11 – 24 December).

A Madden-Julian Oscillation (MJO) signal was present over the Maritime Continent (Phase 4) at the start of the forecast period. Most models predict this MJO signal to propagate eastwards to reach the Western Pacific (Phase 6) in Week 1, and then weaken over the Western Pacific (Phases 6 and 7) in Week 2.

The outlook is assessed for the region in general, where conditions are relative to the average conditions for the corresponding time of year. For specific updates on the national scale, the relevant ASEAN National Meteorological and Hydrological Services should be consulted.

Drier conditions are predicted over much of the southern Maritime Continent in Week 1 (11 – 17 December), extending eastwards in Week 2 (18 – 24 December). Drier conditions are also predicted over parts of the northeastern Maritime Continent and eastern coast of Mainland Southeast Asia in Week 1.

Wetter conditions are predicted over parts of the western Maritime continent in Week 1 (11 – 17 December), extending eastwards to Borneo in Week 2 (18 – 24 December).

Warmer than usual temperature is predicted over much of the northern ASEAN region in Week 1 (11 – 17 December) and over most of the Maritime Continent during the next fortnight (11 – 24 December).

A Madden-Julian Oscillation (MJO) signal was present over the Maritime Continent (Phase 4) at the start of the forecast period. Most models predict this MJO signal to propagate eastwards to reach the Western Pacific (Phase 6) in Week 1, and then weaken over the Western Pacific (Phases 6 and 7) in Week 2.

The outlook is assessed for the region in general, where conditions are relative to the average conditions for the corresponding time of year. For specific updates on the national scale, the relevant ASEAN National Meteorological and Hydrological Services should be consulted.