Regional Haze Situation
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Latest Weather and Haze Situation
It was dry over the northern ASEAN region today, apart from showers over parts of southeastern Mekong sub-region and the northern Philippines. Clusters of widespread hotspots were detected in Lao PDR, while isolated to scattered hotspots were detected elsewhere in the Mekong sub-region. Moderate to dense transboundary haze was observed drifting eastwards from eastern Myanmar into northern Thailand and northern Lao PDR, from northern Thailand into northern Lao PDR, and from northern Lao PDR into northern Viet Nam. Moderate smoke plumes were observed to emanate from isolated hotspots in eastern and western Thailand, western and southern Cambodia, southern Lao PDR and central Viet Nam. Many air quality stations in the northern and eastern parts of the Mekong sub-region reported Unhealthy levels, with a few stations reporting Very Unhealthy levels. A partial satellite pass and cloud cover made it difficult to determine the full extent of the hotspot and smoke haze situation over the northern and southeastern parts of the Mekong sub-region.
The southern ASEAN region was wet today, with the overall hotspot and haze situation subdued. Few hotspots were detected in Sabah and Sarawak, but no significant smoke plumes were observed from satellite imagery.
Weather and Haze Outlook
Dry weather is expected to persist over the northern ASEAN region, except over the southern Philippines where showers are forecast. The elevated hotspots and transboundary haze situation is likely to continue in the Mekong sub-region, especially in the northern areas. The prevailing winds over the Mekong sub-region are expected to blow from the southwest to west, whereas the prevailing winds over the Philippines are forecast to blow from the east to southeast.
The southern ASEAN region is likely to continue experiencing showers, which should keep the hotspot and smoke haze situation subdued. The prevailing winds over areas south of the Equator are expected to blow mainly from the southeast, while light and variable winds are forecast over areas near the Equator.
- 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.