Regional Haze Situation
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Latest Weather and Haze Situation
Dry weather was observed over many parts of the Mekong sub-region today except for a few showers over the southeastern parts of the sub-region. Widespread hotspots were detected in the norther parts of Lao PDR. Clusters of scattered hotspots were detected in the central and southern parts of Lao PDR and the southern parts of Viet Nam. Isolated hotspots were detected elsewhere in the Mekong sub-region. Moderate smoke plumes from the northern and central parts of Thailand were observed to drift eastwards into the northern and central parts of Lao PDR respectively. Moderate to dense smoke plumes from many parts of Lao PDR were observed to drift eastwards into the northern and central parts of Viet Nam. Moderate smoke plumes from the southern parts of Viet Nam were observed to drift northwards into the southern parts of Cambodia. Moderate to dense smoke plumes were also observed in other areas of the Mekong sub-region, such as: the central parts of Myanmar, the western parts of Thailand, the southwestern parts of Cambodia and the southern parts of Viet Nam. Many air quality stations in the northern parts of the Mekong sub-region reported Very Unhealthy levels while stations in the central parts of the Mekong sub-region reported Unhealthy levels.
Meanwhile, isolated showers were observed in the southern ASEAN region, with drier weather observed over the northeastern parts of Peninsular Malaysia. A few hotspots were detected in Peninsular Malaysia, Java and Borneo. Slight localised smoke plumes were observed in the northeastern parts of Peninsular Malaysia and the eastern parts of Sarawak. The hotspot and haze situation could not be fully determined due to extensive cloud cover.
Weather and Haze Outlook
In the coming days, persistent dry conditions are forecast over most parts of the Mekong sub-region except for the northern parts of Myanmar where showers are forecast. The heightened hotspot and haze situation over the Mekong sub-region could continue with elevated risks of severe transboundary haze occurrences. The prevailing winds over the Mekong sub-region are forecast to blow from the southwest or west, while the prevailing winds over the Philippines are forecast to blow from the northeast.
Isolated showers are forecast over the southern ASEAN region in the coming days with the exception of drier conditions forecast over the northeastern parts of Peninsular Malaysia. Hotspots and localised smoke plumes can occur in areas facing drier conditions. The prevailing winds over the southern ASEAN region are forecast to be mostly 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.