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Latest Weather and Haze Situation

Isolated showers were observed over the northern ASEAN region today except over northern and western parts of the Mekong sub-region where dry conditions prevailed. From latest satellite imagery, clusters of widespread hotspots were detected in Lao PDR and Myanmar while isolated to scattered hotspots were detected elsewhere in the Mekong sub-region. Widespread moderate to dense smoke plumes were observed to emanate from clusters of hotspots in central and eastern Myanmar drifting towards the northeast into parts of northern Lao PDR and northern Thailand. Transboundary smoke plumes were observed to drift from southern Myanmar into western Thailand and from northern Thailand into northern Lao PDR. Moderate smoke haze was also observed to envelop large parts of Myanmar, parts of eastern Thailand, as well as parts of central Lao PDR. Thick cloud cover over southern, eastern and central parts of the Mekong sub-region made it difficult to discern the hotspot and smoke haze situation there. Many air quality stations in the northern, central and eastern Mekong sub-region reported air quality with Unhealthy levels, with several stations reporting Very Unhealthy levels.

Over the southern ASEAN region, there were some showers except over parts of Borneo, Peninsular Malaysia and Singapore, which were relatively dry. Few to isolated hotspots were detected in Peninsular Malaysia and Sumatra, with moderate smoke plumes observed to emanate from a few hotspots in Peninsular Malaysia.

Weather and Haze Outlook

Over the next few days. Dry weather is still expected to persist over the northwestern parts of the Mekong sub- region, elevated hotspot activity and widespread transboundary haze can be expected to continue in these areas. Isolated showers are forecast over the rest of the Mekong sub-region. The prevailing winds over the northern ASEAN region are forecast to blow from the east or southeast except over the Mekong sub-region where light and variable winds are forecast.

For the southern ASEAN region, showers are expected to prevail, except for parts of southern Peninsular Malaysia and northern Borneo where drier conditions are likely. Some isolated hotspots with localised smoke plumes may occur, however overall hotspot activity is still likely to remain subdued. The prevailing winds over the southern ASEAN region are expected to blow from the east to southeast.

  • 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 more frequently at 0300 UTC and 0900 UTC upon activation of Alert Level 2 or Alert Level 3. Updates at 0300 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.