Subseasonal Weather Outlook and Review

Subseasonal Weather Outlook (14 – 27 June 2021)

Issued 11 June 2021
First forecast week: 14 June – 20 June
Second forecast week: 21 June – 27 June

Figure 1: Rainfall Outlook

Figure 2: Temperature Outlook

 

In Week 1 (14 – 20 June), wetter conditions are expected to develop over the western coastal region of Myanmar before transiting to drier conditions in Week 2 (21 – 27 June).

Over much of the rest of the northern ASEAN region, there is an increased chance of drier conditions than usual during the next fortnight (14 – 27 June).

Warmer temperatures than usual are expected over much of the southern parts of the Maritime Continent in the next fortnight (14 – 27 June). Warmer conditions may also develop over much of Mainland Southeast Asia, particularly inland areas, in Week 2 (21 – 27 June).

The MJO signal was no longer discernable based on the RMM Index. Some models predict an MJO signal to emerge either in the Western Hemisphere and Africa (Phases 8 and 1) or the Indian Ocean (Phases 2 and 3) 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.

Subseasonal Weather Outlook (14 – 27 June 2021)

Issued 11 June 2021
First forecast week: 14 June – 20 June
Second forecast week: 21 June – 27 June

Figure 1: Rainfall Outlook

Figure 2: Temperature Outlook

 

In Week 1 (14 – 20 June), wetter conditions are expected to develop over the western coastal region of Myanmar before transiting to drier conditions in Week 2 (21 – 27 June).

Over much of the rest of the northern ASEAN region, there is an increased chance of drier conditions than usual during the next fortnight (14 – 27 June).

Warmer temperatures than usual are expected over much of the southern parts of the Maritime Continent in the next fortnight (14 – 27 June). Warmer conditions may also develop over much of Mainland Southeast Asia, particularly inland areas, in Week 2 (21 – 27 June).

The MJO signal was no longer discernable based on the RMM Index. Some models predict an MJO signal to emerge either in the Western Hemisphere and Africa (Phases 8 and 1) or the Indian Ocean (Phases 2 and 3) 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.