• Alert Level 0 | End of Dry Season for the Northern ASEAN Region
  • The downgrade of Alert Level 1 to Alert Level 0 indicates the end of dry season for the northern ASEAN region. The regional haze situation will be updated daily at 0900 UTC.

Regional Haze Situation

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MSSModerate Haze MSSDense Haze MSS 2500 ft Wind MSSLow Confidence Hotspot MSSMedium Confidence Hotspot MSSHigh Confidence Hotspot

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Latest Weather and Haze Situation

Drier conditions persisted over Peninsular Malaysia, the Lesser Sunda Islands, Borneo and the central parts of the Mekong sub-region today, while showers fell elsewhere over the ASEAN region. A few hotspots were detected in Sumatra, Lao PDR, Thailand, Viet Nam and Myanmar but no smoke haze was observed.

Weather and Haze Outlook

Drier conditions are expected over parts of the western Mekong sub-region and most parts of the southern ASEAN region, except for southern Sumatra and western Borneo in the coming days. Showers are forecast for other parts of the ASEAN region. Localised hotspots and smoke haze may occur if dry weather is prolonged over fire-prone regions in these areas. The winds are forecast blow from the southwest or west in the northern ASEAN region while the winds are forecast to be light and variable in direction in the southern ASEAN region.

  • All maps are to be used solely for displaying meteorological/geophysical information, and not for any other purpose. All maps are not to scale and for illustrative purpose only.
  • The hotspots depicted on the map are derived from the NOAA satellite and they represent locations with possible fires. Hotspots may go undetected due to cloudy conditions or incomplete satellite pass.
  • At Alert Level 0 and Alert Level 1, the regional haze situation is updated once a day at 0900 UTC. The regional haze situation is updated thrice daily at 0200 UTC, 0500 UTC and 0900 UTC upon activation of Alert Level 2 or Alert Level 3. Updates at 0200 and 0500 UTC display hotspot information from night-time passes of the NOAA-20 satellite. Fewer hotspots were typically detected at night as fire activities usually peak during the day.
  • Reprocessed satellite data will be availed at a later timing. The hotspot information derived from satellite data reprocessed may differ slightly from that received near real-time but reprocessing is necessary for better quality data.
  • The 2500 ft winds (depicted by arrows) are model analysis winds.

Seasonal Forecast for May-June-July 2022

Summary of Outlook

The prevailing inter-monsoon period is expected to persist in May 2022. During this period, the prevailing low-level winds are typically light and variable in direction, and wet weather conditions can be expected over many parts of the ASEAN region as the monsoon rain band is located near the Equator. The inter-monsoon conditions typically transition into the Southwest Monsoon in June and continues throughout July. While this marks the onset of the traditional wet season for the northern ASEAN region, it also signals the start of the traditional dry season for the southern ASEAN region characterised by persistent dry conditions over the region.

For the May to July (MJJ) 2022 period, an increased chance of above-normal rainfall is predicted for much of the southern ASEAN region, apart from below-normal rainfall over the western Maritime Continent. La Niña conditions are present. La Niña conditions are expected to persist through May and likely transition into neutral in June – July 2022. Warmer-than-usual temperature is expected for much of the Maritime Continent, while near-normal temperature is expected over much of Mainland Southeast Asia during MJJ 2022.

The traditional dry season for the northern ASEAN region typically ends in May. In addition, above-normal rainfall expected in the month may further help to alleviate the hotspot and smoke haze situation over the region. In the southern ASEAN region, the hotspot activity is likely to remain generally subdued under wet weather conditions during the inter-monsoon. However, below-normal rainfall is forecast over Peninsular Malaysia as well as northern Sumatra, and hotspots with localised smoke plumes can still be expected in fire-prone areas of the southern ASEAN region during dry periods. As the traditional dry season of the southern ASEAN region sets in during June/July, the hotspot activities over the region are expected to escalate. Despite the above-normal rainfall forecast over most parts of the southern Maritime Continent, the escalation of hotspot activities can still be expected there.

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ASEAN Climate Outlook Forum

The ASEAN Climate Outlook Forum (ASEANCOF) is an avenue to collaboratively develop consensus-based seasonal climate outlooks and related information on a regional scale.

17th ASEAN COF

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ASEAN Haze Online

Recent Updates

27

May

Subseasonal Weather Outlook (30 May – 12 June 2022)
For rainfall, wetter conditions are expected over the southern Maritime Continent in the next fortnight (30 May – 12 June). Drier conditions are expected over much of the eastern half of the equatorial region in …
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17

May

Review of Regional Weather for April 2022
During April 2022, near- to above-average rainfall was recorded over much of the northern ASEAN region, while a mix of below- to above-average rainfall was recorded over the southern ASEAN region. For the northern ASEAN region, the largest positive anomalies (wetter conditions) were recorded over …
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17

May

Review of Regional Haze Situation for April 2022
The Northeast Monsoon gradually transitioned to inter-monsoon conditions in April 2022 as the monsoon rainband moved northwards over the equator. The prevailing winds over most parts of the ASEAN region were light and variable …
More details