Sri Lanka: Adverse weather forecast across much of the country through at least May 1

Severe weather is forecast across much of Sri Lanka through at least May 1. The Sri Lankan Department of Meteorology has issued a warning for severe lightning through late April 30, with a high risk of severe storms likely over Central, Sabaragamuwa, and Western provinces and Galle, Matara, and Puttalam districts. There is a moderate risk of severe lightning across the rest of Sri Lanka. The public is advised to take precautions during severe storms, such as seeking shelter and being aware of fallen trees and power lines. Further showers and storms are forecast across Central, Sabaragamuwa, and Western provinces and Galle and Matara districts May 1, and isolated showers and storms are expected in parts of North-Western Province.

Thunderstorms will be capable of producing strong winds, heavy rainfall, and lightning. 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 rainfall has saturated the soil.

Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding, strong winds, or landslides impact utility networks.

The severe weather will likely contribute to transport disruptions throughout the country. Traffic and commercial trucking delays might occur along regional highways. Flooding downpours could inundate some low-lying roads in areas with poor drainage. Strong winds might also pose a hazard to high-profile vehicles. Hazardous weather conditions might cause flight delays and cancellations at regional airports.