Regional Haze Situation

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Latest Weather and Haze Situation

Rainy conditions prevailed over the ASEAN region today and the showers helped to subdue the overall hotspot activity in the region. Few hotspots were detected in parts of Viet Nam, West and North Kalimantan, as well as Sumatra, but no significant smoke haze was observed.

Weather and Haze Outlook

In the coming days, rainy weather is likely to persist over much of the ASEAN region. Hotspot activity in the region is expected to remain low, although isolated hotspots may still be detected over the fire-prone areas during occasional periods of drier conditions. The prevailing winds are forecast to be variable over areas north of the Equator, and to blow mainly from the southeast to southwest over areas south of the Equator.

  • 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 October-December 2022

Summary of Outlook

Southwest Monsoon conditions are typically expected transition gradually to the inter-monsoon period in late October and early November 2022. As the monsoon rainband moves southwards towards the Equator, the prevailing low-level winds over most parts of the ASEAN region are likely to be light and variable in direction. With the onset of the inter-monsoon, shower activities are expected to increase over most parts of the equatorial region.

For the October to December (OND) 2022 period, an increased chance of above-normal rainfall is predicted for much of the ASEAN region, apart from an increase in chance of below-normal rainfall over parts of the western Maritime Continent. La Niña conditions are predicted to continue at least until December 2022. The negative Indian Ocean Dipole (IOD) is expected to weaken towards the end of the year. Both La Niña and negative IOD events tend to bring wetter conditions to parts of the ASEAN region. Warmer-than-normal temperature is predicted for many parts of the ASEAN region, with the exceptions of below- to near-normal temperatures over much of the Mainland Southeast Asia as well as parts of the equatorial region.

The overall hotspot and smoke haze situation is likely to stay subdued in October and November 2022, with above-normal rainfall forecast for much of the ASEAN region. Isolated hotspots and localised smoke plumes may occur in fire-prone areas during brief periods of drier weather. Hotspot activities in the northern ASEAN region are likely to increase towards December 2022 as the traditional dry season sets-in, increasing the risk of smoke haze development for the Mekong sub-region.

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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

30

Sep

Subseasonal Weather Outlook (3 – 16 October 2022)
For rainfall, wetter conditions are predicted over most of the southern ASEAN region in the next fortnight (3 – 16 October). Drier conditions are predicted over the western Maritime Continent in …
More details

30

Sep

Seasonal Weather Outlook (October – December 2022)
Southwest Monsoon conditions are typically expected to transition gradually to the inter-monsoon period in late October and early November 2022…
More details

16

Sep

Subseasonal Weather Outlook (19 September – 2 October 2022)
Wetter conditions are predicted over most of the southern ASEAN region in the next fortnight (19 September – 2 October). Drier conditions are predicted over parts of …
More details