Lebanon: Adverse weather forecast across the country, Dec. 13

Adverse weather conditions are forecast across much of Lebanon Dec. 13. The Lebanon Meteorological Service has warned that a weather system over the eastern Mediterranean will continue to bring volatile weather conditions with at times heavy rainfall, thunderstorms, and strong winds on Dec. 13. Northern regions are expected to be worst affected and snowfall and ice are possible in mountainous parts of the country. Temperatures are expected to remain below the seasonal average before rising on Dec. 14. Brief disruptions were reported at Beirut–Rafic Hariri International Airport (BEY) after heavy rainfall triggered flooding and storms caused a lack of visibility during the afternoon Dec. 12; further disruptions cannot be ruled out Dec. 13.

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 or a lack of stormwater drainage systems. Sites 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.

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

Due to the arid nature of the region and poor stormwater management in some urban areas, even minor rainfall accumulations could quickly result in episodes of flash flooding. Flooding is possible in streams and wadis (dry riverbeds).

The severe weather could contribute to transport disruptions throughout the affected area. Floodwaters and debris flows could render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Traffic and commercial trucking delays might occur along regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters. Strong winds might also pose a hazard to high-profile vehicles.

Hazardous weather conditions might cause flight delays and cancellations at regional airports. 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; some businesses might not operate at full capacity because of flood damage to facilities, possible evacuations, and some employees' inability to reach work sites.