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Latest Weather and Haze Situation

It was partly cloudy over most parts of the northern ASEAN region except for the northeastern and central parts of the Mekong sub-region where showers were observed. Based on the latest satellite surveillance, scattered hotspots were detected in Cambodia, and the southern, eastern and central parts of Myanmar. Isolated hotspots were detected in the northern and central parts of Thailand, and the northern and southern parts of Lao PDR and Viet Nam. From recent satellite imageries, moderate to dense smoke haze was observed to cover parts of Myanmar, northern and central parts of Thailand and the northern parts of Lao PDR. Moderate smoke haze is also observed over the southern parts of Lao PDR, eastern parts of Cambodia and southern parts of Viet Nam. The full extent of the hotspot and smoke haze situation over the eastern and central parts of the Mekong sub-region, and the northern parts of Myanmar, could not be determined due to cloud cover. The air quality levels recorded by stations in the northern, eastern and central parts of the Mekong sub-region were Unhealthy to Very unhealthy. Some ground observations in the northern parts of the sub-region reported low visibility.

In the southern ASEAN region, cloudy conditions with a few showers were observed except for the Peninsular Malaysia where conditions are drier. While the overall hotspot activity in the region remains low, a few to isolated hotspots were mostly detected in Kalimantan, Peninsular Malaysia and Sumatra. No significant smoke plumes were observed.

Weather and Haze Outlook

In the coming days, showers are forecast to persist over the northeastern and central parts of the Mekong sub-region, which may bring some respite to the elevated hotspots and smoke haze situation there. As dry conditions are forecast to persist over the rest of the sub-region, the hotspot and smoke haze situation in the region is expected to remain elevated with heightened risk of transboundary smoke haze occurrence, particularly in the northwestern parts of the sub-region. While the prevailing winds over the northern parts of the Mekong sub-region are forecast to be light and variable in direction, the prevailing winds over the Philippines and the rest of the Mekong sub-region are expected to blow from the northeast.

In the southern ASEAN region, showers are expected except for the Peninsular Malaysia where drier conditions are forecast. While the overall hotspot activity is expected to remain suppressed, isolated hotspots with localised smoke plumes can still occur. The prevailing winds over areas north of the Equator are forecast to blow from the northeast while the prevailing winds over areas south of the Equator are expected to blow from the west or northwest.

  • 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.