Subseasonal Weather Outlook and Review

Subseasonal Weather Outlook (5 – 18 September 2022)

Issued: 2 September 2022
First forecast week: 5 September – 11 September
Second forecast week: 12 September – 18 September

Figure 1: Rainfall Outlook

Figure 2: Temperature Outlook

 

Wetter conditions are predicted over much of the southern Maritime Continent in the next fortnight (5 – 18 September). Wetter conditions are also expected in Week 1 (5 – 11 September) over much of southwestern Mainland Southeast Asia.

Drier conditions are expected over the westernmost part of the Maritime Continent in the next fortnight (5 – 18 September).

For temperature, cooler than usual temperature is predicted over parts of the central Maritime Continent in the next fortnight (5 – 18 September).

No clear Madden-Julian Oscillation (MJO) signal was present at the start of September. Most models predict little to no MJO activity over the forecast period, based on the RMM index.

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.

Subseasonal Weather Outlook (5 – 18 September 2022)

Issued: 2 September 2022
First forecast week: 5 September – 11 September
Second forecast week: 12 September – 18 September

Figure 1: Rainfall Outlook

Figure 2: Temperature Outlook

 

Wetter conditions are predicted over much of the southern Maritime Continent in the next fortnight (5 – 18 September). Wetter conditions are also expected in Week 1 (5 – 11 September) over much of southwestern Mainland Southeast Asia.

Drier conditions are expected over the westernmost part of the Maritime Continent in the next fortnight (5 – 18 September).

For temperature, cooler than usual temperature is predicted over parts of the central Maritime Continent in the next fortnight (5 – 18 September).

No clear Madden-Julian Oscillation (MJO) signal was present at the start of September. Most models predict little to no MJO activity over the forecast period, based on the RMM index.

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.