Thailand: Adverse weather forecast across northern and central regions through at least April 11

Severe weather is forecast across much of northern and central Thailand through at least April 11. As of early April 8, the Thai Meteorological Department has issued a weather advisory warning of an outbreak of summer storms across the region over the coming days due to hot to very hot conditions. The storms are forecast to start in the northeastern region April 8 before spreading over the rest of northern and central Thailand April 9-10 and persisting over the northern region April 11.

Storms may be accompanied by heavy downpours, strong winds, hail, and possible lightning, dropping temperatures. Rough sea conditions are also expected in the Gulf of Thailand. Strong winds may cause property damage and power outages in parts of the affected area.

Sustained heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites located downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly or mountainous areas, especially where heavy rain has saturated the soil. Disruptions to electricity and telecommunications services are possible where significant flooding, landslides, or strong winds impact utility networks.

Floodwaters and debris flows could render some bridges, rail networks, or roadways impassable, impacting overland travel around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters.

Severe weather could also trigger intermittent flight delays and cancellations at airports across the affected region, though these are unlikely to be severe or prolonged. Authorities may temporarily suspend port operations or close beach fronts if strong winds trigger hazardous sea conditions. Flooding could block regional rail lines; freight and passenger train delays and cancellations are possible in areas with heavy rainfall and potential track inundation. Localized business disruptions may occur in low-lying areas.

Flooding could heighten the threat of disease outbreaks. Backflow from drains mixed with floodwaters can become trapped in open areas when inundations recede. These stagnant pools often become a breeding ground for mosquitoes and bacteria, increasing the incidence of insect- and water-borne diseases. Exposure to contaminated water from inundated industrial sites, sewer systems, and septic tanks also poses a significant health threat.