Regional Haze Situation
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Latest Weather and Haze Situation
Dry conditions were observed over most parts of the northern ASEAN region, except for the southern and central parts of the Philippines, and the southeastern parts of Mekong sub-region where there were a few showers. From the latest satellite surveillance, clusters of scattered hotspots were detected in the northern parts of Lao PDR and the western parts of Cambodia. Isolated to scattered hotspots were detected in the rest of the Mekong sub-region. Based on recent satellite observations, moderate to dense transboundary smoke haze was observed to drift eastwards from the hotspots detected in the eastern parts of Myanmar into the northern parts of Lao PDR and Thailand, from the hotspots detected in the northern parts of Thailand into the northern parts of Lao PDR, and the hotspots detected in the northern parts of Lao PDR into the northern parts of Viet Nam. Moderate to dense smoke haze was observed over other parts of Myanmar, and moderate smoke haze was observed over the southeastern parts of Thailand, the southern parts of Lao PDR, and the central parts of Viet Nam. Moderate smoke plumes were also observed to emit from the hotspots detected in the eastern and western parts of Cambodia and the central parts of Thailand. Some air quality stations over the northern and eastern parts of the Mekong sub-region measured Unhealthy level, with a few stations recorded Very unhealthy level.
Showers and cloudy conditions were observed over most parts of the southern ASEAN region. Hotspot activity in the region remained low, with a few hotspots detected mostly in Borneo and the eastern parts of Peninsular Malaysia. Localised smoke plumes were observed to emit from the hotspots detected in the eastern coastal areas of Peninsular Malaysia.
Weather and Haze Outlook
While rainfall is expected over the southern parts of the Philippines, dry conditions are forecast to persist over the rest of the northern ASEAN region. The elevated hotspot activity and widespread transboundary smoke haze occurrence are expected to continue over the Mekong sub-region under this weather conditions. The prevailing winds over the Philippines are forecast to blow from the east or southeast, while the prevailing winds over the Mekong sub-region are expected to blow mostly from the south or southwest.
Wet weather is forecast to persist over the southern ASEAN region. While the overall hotspot activity is expected to remain suppressed, isolated hotspots with localised smoke plumes can still occur over drier areas. The prevailing winds over areas near the Equator are expected to be light and variable in direction, but the prevailing winds over areas south of the Equator are forecast to blow from the east or 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.