The Twelfth ASEANCOF (ASEANCOF-12) was organised by the Thai Meteorological Department in collaboration with Meteorological Service Singapore as host of the ASEAN Specialised Meteorological Centre. The consensus for June-July-August (JJA) 2019 outlooks was achieved through online correspondence. Representatives from National Meteorological and Hydrological Services (NMHSs) of ASEAN Member States created a consensus forecast for the boreal summer monsoon 2019 in the ASEAN region. The consensus for June-July-August (JJA) 2019 outlooks was achieved through online correspondence. The consensus was made based on completed questionnaires regarding current conditions and predictions for the Southeast Asia region as well as an online discussion.

Contents of Issue #3:

• Climate Review (July – December 2018): Warm SSTs but overall neutral ENSO
• Regional Fire and Haze Situation (July – December 2018): Brief occurrence of transboundary haze during periods of dry weather
• Climate and Haze Outlook (March – August 2019): El Niño conditions may develop from the second quarter of 2019
• Significant weather events in Southeast Asia article from PAGASA
• ASMC events: ASMC Workshop on the Use and Interpretation of Data for Fire and Haze Monitoring for the Mekong Sub-region, the Eleventh Session of the ASEAN Climate Outlook Forum (ASEANCOF-11)

The Eleventh ASEAN Climate Outlook Forum (ASEANCOF-11) was held in Kuala Lumpur, Malaysia from 29 October – 01 November 2018. This forum was organised by the Malaysian Meteorological Department in collaboration with the ASEAN Specialised Meteorological Centre (ASMC). Representatives from National Meteorological and Hydrological Services (NMHSs) of ASEAN Member States, with input from experts from several international centres, created a consensus outlook for boreal winter monsoon 2018/2019 (December 2018 – February 2019).

Contents of Issue #2:

• Climate Review (January – June 2018): Weak to moderate La Niña conditions observed in early 2018
• Regional Fire and Haze Situation (January – June 2018): Dry season led to persistent hotspot activities in northern Southeast Asia
• Climate and Haze Outlook (September 2018 – February 2019): Weak El Niño development favoured in late 2018
• Significant weather events in Southeast Asia article from PAGASA
• ASMC events: ASMC 25th Anniversary, Best Practice Workshop on Climate Change Projections, Second Subseasonal-to-Seasonal Predictions Workshop

The Tenth ASEANCOF (ASEANCOF-10) was organised by the Malaysian Meteorological Department in collaboration with the Meteorological Services Singapore as host of the ASEAN Specialised Meteorological Centre. Representatives from National Meteorological and Hydrological Services (NMHSs) of ASEAN Member States created a consensus forecast for the boreal summer monsoon 2018 in the ASEAN region. The consensus for June-July-August (JJA) 2018 outlooks was achieved through online correspondence.

Contents of Issue #1:

• Climate Review (July – December 2017): From neutral conditions to late-developing, weak La Niña
• Regional Fire and Haze Situation (July – December 2017): Wetter conditions contributed to low hotspot count
• Climate and Haze Outlook (February – July 2018): Weak La Niña continuing in early 2018
• Significant weather events in Southeast Asia article from PAGASA
• ASMC events: ASEANCOF-9, Training Workshop on “The Use & Interpretation of Data on Land & Forest Fires & Transboundary Haze”

The Ninth ASEAN Climate Outlook Forum (ASEANCOF-9) was held in Hanoi, Vietnam from 15-17 November 2017. The Forum was organised by the National Hydro-Meteorological Service of Viet Nam (NHMS) in cooperation with the ASEAN Specialised Meteorological Centre (ASMC). Representatives from National Meteorological and Hydrological Services (NMHSs) of ASEAN Member States created a consensus forecast for the boreal winter monsoon 2017/2018 (December 2017 – February 2018).