Regional Haze Situation

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Latest Weather and Haze Situation

Dry conditions were observed over most of the southern ASEAN region today while cloudy and rainy conditions were observed over the northern ASEAN region under the influence of Tropical Storm Chaba, located over the northern South China Sea. While the hotspot situation over the northern ASEAN region was subdued, isolated hotspots were detected in Sumatra, and a few hotspots were detected in Sarawak. Isolated smoke plumes were also observed to emanate from some hotspots detected in central Sumatra.

Weather and Haze Outlook

Dry weather is expected to continue over Peninsular Malaysia, Singapore and Sumatra in the coming days as well as parts of northern Borneo. Showers are forecast elsewhere in ASEAN region and Tropical Storm Chaba is forecast to track northwest, making landfall north of the ASEAN region in the next few days. Isolated to scattered hotspots and localised smoke plumes may occur, particularly over fire-prone areas in Borneo and Sumatra, if dry weather is prolonged. Under the influence of Tropical Storm Chaba, the winds over the entire ASEAN region are forecast to be strong and blow from the southeast or southwest.

  • 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 July-August-September 2022

Summary of Outlook

Southwest monsoon conditions became fully established over the ASEAN region in June 2022, with the prevailing low-level winds blowing from the southeast or southwest. During the southwest monsoon, the monsoon rainband is typically located over the northern ASEAN region, leading the onset of the traditional wet season over the region. Over the southern ASEAN region, drier conditions become established as this region enters its traditional dry season.
 
For the July to September (JAS) 2022 period, an increased chance of above-normal rainfall is predicted for much of the southern ASEAN region, while there is small increase in chance of below-normal rainfall over parts of the band from 10°N to 20°N. Weak La Niña conditions are present, although these conditions are likely to continue weakening during July – August. After August, either La Niña or ENSO neutral conditions are expected. A negative Indian Ocean Dipole (IOD) is developing and expected to become established during July – August. Warmer-than-normal temperature is predicted for much of the ASEAN region, with the exception of near-normal temperature around Borneo.
 
In the southern ASEAN region, even though above-normal rainfall is forecast over much of the region, hotspot and smoke haze activities are expected to intensify as dry conditions become established in July – September 2022. This may lead to an increased likelihood of transboundary haze events if dry conditions are persistent over fire-prone regions. In the northern ASEAN region, hotspot and smoke haze activities are expected to remain subdued as the region enters its traditional wet season. However, a higher chance of below-normal rainfall is forecast in the coming months, which may lead to localised development of hotspots and smoke plumes over fire-prone areas.

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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.

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Related Website

ASEAN Haze Online

Recent Updates

1

Jul

Start of Dry Season for the Southern ASEAN Region
Over the past week, there have been periods of dry weather observed over many parts of southern ASEAN region. Based on surveillance by the NOAA-20 satellite…
More details

24

Jun

Subseasonal Weather Outlook (27 June – 10 July 2022)
Wetter conditions are expected over much of the southern half of the Maritime Continent in the next fortnight (27 June – 10 July). Wetter conditions are also expected over northern Mainland Southeast Asia and northern Philippines in Week 1 (27 June – 3 July). Warmer than …
More details

17

Jun

Review of Regional Weather for May 2022
During May 2022, near- to above-average rainfall was recorded over much of the northern ASEAN region, while a mixture of below- to above-average rainfall was recorded over the southern ASEAN region (Figure 1). For the northern ASEAN region, the largest positive anomalies in rainfall (wetter conditions) were recorded …
More details