Subseasonal Weather Outlook (17 – 30 April 2023)

Issued: 14 April 2023
First forecast week: 17 April 2023 – 23 April 2023
Second forecast week: 24 April 2023 – 30 April 2023


Figure 1: Rainfall Outlook


Figure 2: Temperature Outlook


In Week 1 (17 – 23 April), drier conditions are predicted over much of Mainland Southeast Asia, the Malay Peninsula and parts of the central Maritime Continent.

Warmer than usual temperature is predicted over much of Mainland Southeast Asia and the Malay Peninsula in Week 1 (17 – 23 April), in line with the predicted drier conditions over these regions.

A Madden-Julian Oscillation (MJO) signal was present over the Western Pacific (Phases 6 and 7) in the second week of April. Most models predict this MJO signal to continue propagating eastwards before decaying over the Western Hemisphere and Africa (Phase 1) towards the end of 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.