Subseasonal Weather Outlook (16 – 30 September 2019)

Issued 14 September 2019
Valid for weeks 3 and 4: 16 September – 30 September


Figure 1: Rainfall Outlook

Figure 2: Temperature Outlook

In the second fortnight of September 2019, drier-than-usual conditions are forecast to persist over most parts of the southern ASEAN region. The positive Indian Ocean Dipole (IOD) is likely a contributing factor to the drier conditions, as colder-than-average sea surface temperatures continue to persist over the eastern Indian Ocean.

Warmer conditions are forecast to prevail over much of the southern ASEAN region, and over the northern half of the Mekong sub-region in the third week of September.

The outlook is assessed for the region in general. For specific updates on the national scale, the relevant ASEAN National Meteorological and Hydrological Services should be consulted.