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Latest Weather and Haze Situation

Dry and cloudy conditions persisted across the Mekong sub-region today, except for a few isolated showers along the southeastern coast. Widespread hotspots were detected in northern and eastern Cambodia, scattered hotspots were detected in Myanmar and Thailand, while isolated hotspots were detected in other parts of the Mekong sub-region. Slight to moderate smoke plumes were observed to emit from clusters of hotspots in northern Thailand, northern and eastern Cambodia, as well as northern Myanmar. Slight smoke plumes were also observed to emit from isolated hotspots in northern Viet Nam, as well as northern and central Lao PDR. Several stations in the northern parts of the Mekong sub-region reported moderate to unhealthy air quality today, but the full extent of the hotspot and smoke haze conditions could not be determined due to thick cloud cover over northern Thailand, northern Lao PDR and Viet Nam.

Weather and Haze Outlook

Continued dry weather conditions are forecast for most parts of the Mekong sub-region, although some showers are likely for central Viet Nam. Wet weather conditions are also expected in other parts of the ASEAN region, with heavy rainfall expected over the eastern coast of Peninsular Malaysia, as well as central and southern parts of the Philippines. There remains a high risk of escalating hotspot activities and transboundary smoke haze for fire-prone areas of the Mekong sub-region. Strong northeasterly to easterly winds over areas north of the Equator are expected to ease in the coming days, while the prevailing winds over areas south of the Equator are likely to continue blowing 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.