Under the influence of prolonged dry conditions, scattered hotspots and hazy conditions were detected in the Mekong sub-region particularly in Cambodia and Thailand. Air quality in many areas of northern Thailand remained at Unhealthy to Very Unhealthy level, based on observation at a number of stations. The deterioration in air quality could be due to a build-up of smoke haze under the convergence of winds over northern parts of the Mekong sub-region. Some transboundary smoke haze was observed from northern Thailand to northern parts of Lao PDR. Thin to moderate smoke haze was also observed from isolated hotspots in Myanmar. However, the full extent of haze situation in the Mekong sub-region could not be determined due to cloud obscuration of satellite observation. In the southern ASEAN region, there were scattered showers over many areas.
Updated 4:52 PM 28 Jan
Weather and Haze Outlook
The weather over the Mekong sub-region is forecast to remain dry, except in northern Viet Nam where isolated showers can be expected in the next few days. The prevailing winds are expected to remain weak, and blowing mainly from the northeast or east. With convergence of winds forecast to remain over the northern Mekong sub-region, hazy conditions are likely to persist. In the southern ASEAN region, scattered showers are expected. The prevailing winds are forecast to continue blowing from the northwest or northeast.