Regional Haze Situation








Latest Weather and Haze Situation
Dry and cloudy conditions prevailed over most parts of the northern ASEAN region overnight. Isolated to scattered hotspots were detected in the Mekong sub- region. Slight to moderate haze was observed over many parts of Myanmar, the northern and central parts of Thailand, southern Cambodia, as well as the northern parts of Lao PDR. However, the full extent of the hotspot and smoke haze situation in the sub-region could not be determined due to cloud cover. Most air quality stations in the northern and eastern Mekong sub-region reported Moderate to Unhealthy levels.
Elsewhere, showers were observed over most part of the southern ASEAN region overnight, except over Peninsular Malaysia and the southern and eastern parts of Borneo. A few hotspots were detected in Kalimantan but no smoke plumes were observed from satellite imagery.
Weather and Haze Outlook
Over the next few days, dry conditions are expected to persist over the northwestern parts of the Mekong sub- region, while showers are forecast elsewhere in the sub- region. The hotspot and smoke haze activities may improve over areas in the Mekong sub-region where showers are expected but also intensify over the northwestern parts of the sub-region experiencing prolonged dry conditions, with an increased risk of transboundary haze occurrence. The prevailing winds north of the Equator are expected to blow from the northeast to southeast, except over the Mekong sub- region where the winds are forecast to be light and variable.
Meanwhile, shower activities are expected over the southern ASEAN region in the coming days and the hotspot activity in the region is expected to remain low. The winds south of the Equator are forecast to be light and variable in direction.
- 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.