Subseasonal Weather Outlook and Review

Wetter conditions are predicted over parts of the northeastern Maritime Continent in the next fortnight (28 April – 11 May). Wetter conditions are also predicted in Week 1 (28 April – 4 May) over most of Mainland Southeast Asia, apart from the southeastern portion.

Drier conditions are predicted over much of the central Maritime Continent in Week 1 (28 April – 4 May).

No significant regional temperature anomalies are expected in the next fortnight (28 April – 11 May).

There was no discernible Madden-Julian Oscillation (MJO) signal during mid-April, based on the RMM Index. Most models predict a weak MJO signal to propagate from the Western Pacific (Phase 7) to the Western Hemisphere (Phase 8) in Week 1, before decaying in Week 2. The other models predict no discernible MJO activity during the forecast period.

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.

Wetter conditions are predicted over parts of the northeastern Maritime Continent in the next fortnight (28 April – 11 May). Wetter conditions are also predicted in Week 1 (28 April – 4 May) over most of Mainland Southeast Asia, apart from the southeastern portion.

Drier conditions are predicted over much of the central Maritime Continent in Week 1 (28 April – 4 May).

No significant regional temperature anomalies are expected in the next fortnight (28 April – 11 May).

There was no discernible Madden-Julian Oscillation (MJO) signal during mid-April, based on the RMM Index. Most models predict a weak MJO signal to propagate from the Western Pacific (Phase 7) to the Western Hemisphere (Phase 8) in Week 1, before decaying in Week 2. The other models predict no discernible MJO activity during the forecast period.

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.