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Latest Weather and Haze Situation

While cloudy conditions and rain were observed over Myanmar as well as the northern parts of Thailand, Lao PDR and Viet Nam, it was fair and dry over the rest of the Mekong sub-region. Based on the overnight satellite imagery, isolated hotspots were detected mostly in Cambodia, Lao PDR and the southern parts of Viet Nam. From the latest satellite imagery, slight to moderate smoke haze was observed over parts of Lao PDR and the southern parts of Myanmar. The full extent of the hotspot and smoke haze situation over the northern parts of the Mekong sub-region could not be determined due to extensive cloud cover. Moderate to unhealthy air quality levels were observed by most of the air quality stations situated over the northern and eastern parts of the sub-region with a few stations measured very unhealthy air quality level.

In the rest of the ASEAN region, cloudy and isolated showers were observed except for the Philippines where it was mostly fair. Hotspot activity remained suppressed based on satellite surveillance.

Weather and Haze Outlook

Dry conditions are forecast over most parts of the Mekong sub-region except for the northern parts of Myanmar where isolated showers are expected. With the ongoing dry conditions, the hotspot and smoke haze situation, as well as the risk of transboundary haze occurrence, are expected to remain elevated. The prevailing winds over most parts of the sub-region are forecast to blow from the southwest or west.

Elsewhere in the ASEAN region, rainy weather is forecast except for the northern and central parts of the Philippines where drier conditions are expected. The overall hotspot activity is expected to remain suppressed. The prevailing winds 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.