Subseasonal Weather Outlook and Review

Wetter conditions are predicted for most of the equatorial region in the next fortnight (30 September – 13 October).

Drier conditions are predicted over much of central and southern Mainland Southeast Asia in Week 1 (30 September – 6 October).

Warmer than usual temperature is predicted in the next fortnight (30 September – 13 October) over much of southern Mainland Southeast Asia and the Maritime Continent apart from the equatorial region.

Cooler than usual conditions are predicted over northeast Mainland Southeast Asia in Week 1 (30 September – 6 October).

A Madden-Julian Oscillation (MJO) signal was present over the Western Pacific (Phases 6 and 7) during the third week of September. For Week 1, most models predict this signal to propagate from the Western Hemisphere (Phase 1) to the Indian Ocean (Phases 2 and 3). For Week 2, most models predict the MJO signal to become inactive.

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 for most of the equatorial region in the next fortnight (30 September – 13 October).

Drier conditions are predicted over much of central and southern Mainland Southeast Asia in Week 1 (30 September – 6 October).

Warmer than usual temperature is predicted in the next fortnight (30 September – 13 October) over much of southern Mainland Southeast Asia and the Maritime Continent apart from the equatorial region.

Cooler than usual conditions are predicted over northeast Mainland Southeast Asia in Week 1 (30 September – 6 October).

A Madden-Julian Oscillation (MJO) signal was present over the Western Pacific (Phases 6 and 7) during the third week of September. For Week 1, most models predict this signal to propagate from the Western Hemisphere (Phase 1) to the Indian Ocean (Phases 2 and 3). For Week 2, most models predict the MJO signal to become inactive.

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.