Subseasonal Weather Outlook and Review

Wetter conditions are predicted over much of the equatorial region and southwestern Maritime Continent in the next fortnight (15 – 28 September).

Drier conditions are predicted over central and northeastern Mainland Southeast Asia in Week 1 (15 – 21 September).

Cooler than usual temperatures are predicted in Week 1 (15 – 21 September) over the southwestern Maritime Continent and parts of the central equatorial region.

No coherent Madden-Julian Oscillation (MJO) signal was present at the start of September.
Most models predict no significant 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 much of the equatorial region and southwestern Maritime Continent in the next fortnight (15 – 28 September).

Drier conditions are predicted over central and northeastern Mainland Southeast Asia in Week 1 (15 – 21 September).

Cooler than usual temperatures are predicted in Week 1 (15 – 21 September) over the southwestern Maritime Continent and parts of the central equatorial region.

No coherent Madden-Julian Oscillation (MJO) signal was present at the start of September.
Most models predict no significant 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.