Subseasonal Weather Outlook and Review

 
Drier conditions are predicted over much of the southern Maritime Continent in Week 1 (25 – 31 December 2023). Drier conditions are also predicted over parts of the northeastern Maritime Continent in Week 1, extending to the eastern coast of Mainland Southeast Asia in Week 2 (1 – 7 January 2024).

Wetter conditions are predicted over parts of the western Maritime continent in Week 1 (25 – 31 December 2023), extending eastwards to Borneo in Week 2 (1 – 7 January 2024).

Warmer than usual temperature is predicted over most of the Maritime Continent during the next fortnight (25 December 2023 – 7 January 2024).

Cooler than usual temperature is predicted over much of central Mainland Southeast Asia in Week 1 (25 – 31 December 2023).

A weak Madden-Julian Oscillation (MJO) signal was present over the Western Hemisphere and Africa (Phases 8 and 1) at the start of the forecast period. Most models predict the MJO signal to propagate through the Western Hemisphere and Africa and reach the Indian Ocean (Phase 2) in Week 1, and then weaken over the Indian Ocean (Phases 2 and 3) 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 (25 – 31 December 2023). Drier conditions are also predicted over parts of the northeastern Maritime Continent in Week 1, extending to the eastern coast of Mainland Southeast Asia in Week 2 (1 – 7 January 2024).

Wetter conditions are predicted over parts of the western Maritime continent in Week 1 (25 – 31 December 2023), extending eastwards to Borneo in Week 2 (1 – 7 January 2024).

Warmer than usual temperature is predicted over most of the Maritime Continent during the next fortnight (25 December 2023 – 7 January 2024).

Cooler than usual temperature is predicted over much of central Mainland Southeast Asia in Week 1 (25 – 31 December 2023).

A weak Madden-Julian Oscillation (MJO) signal was present over the Western Hemisphere and Africa (Phases 8 and 1) at the start of the forecast period. Most models predict the MJO signal to propagate through the Western Hemisphere and Africa and reach the Indian Ocean (Phase 2) in Week 1, and then weaken over the Indian Ocean (Phases 2 and 3) 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.