Subseasonal Weather Outlook (7 – 20 August 2023)
Issued: 4 August 2023
First forecast week: 7 August – 13 August 2023
Second forecast week: 14 August – 20 August 2023
Drier conditions are predicted over much of the southern ASEAN region in the next fortnight (7 – 20 August). Drier conditions are also predicted over much of Mainland Southeast Asia and northern parts of the Philippines in Week 1 (7 – 13 August).
Wetter conditions are predicted over the central and southern Philippines as well as the surrounding region in the next fortnight (7 – 20 August).
Warmer than usual temperature is predicted over the eastern equatorial region in Week 1 (7 – 13 August). These warmer temperatures are predicted to extend westwards to cover most of the central and eastern equatorial region in Week 2 (14 – 20 August). Warmer than usual temperature is also predicted over much of the northern ASEAN region in the next fortnight (7 – 20 August).
No Madden-Julian Oscillation (MJO) signal was present at the start of August. Most models predict no significant MJO signal 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.