Morocco, Algeria: Adverse weather forecast in northern regions through Dec. 3.

Event

Thunderstorms, heavy rainfall, snow, and ice are forecast across northern Morocco and northern Algeria through at least Dec. 3.

Algeria's National Meteorological Office has issued the following warnings through Dec. 3:

• Orange heavy rain warnings (the second-highest level on a four-tier scale): Tlemcen, Ain Temouchent, Oran, Mostaganem, Chlef, Tipaza, Algiers, Boumerdes, Tizi Ouzou, Bouira, Blida, Medea, Ain Defla, Tissemsilt, Tiaret, Relizane, Mascara and Sidi Bel Abbes provinces.

• Orange snow and ice warnings: Tlemcen, Sidi Bel Abbes, Saida, Naama, El Bayadh, Laghouat, Djelfa, Tiaret, Tissemsilt, Ain Defla, Medea, Blida, Bouira, Tizi Ouzou, Bejaia, Jijel, Bordj Bou Arreridj, Setif, Batna, Khenchela and Tebessa provinces.

• Yellow rain, wind, and snow warnings: the rest of the affected area.

Rainfall of between 2-4 cm (1-2 inches) is forecast on the orange heavy rain warning areas and may come in the form of thunderstorms and be accompanied by strong winds and hail. Between 5-15 cm (2-6 inches) of snowfall is expected in elevated areas in the orange snow warning areas.

Morocco's General Directorate of Meteorology has issued the following warnings through Dec. 3:

• Orange snow, heavy rainfall, and strong wind warnings (the second-highest level on a four-tier scale): most of Beni Mallal-Khenifra and Fez-Meknes regions, as well as northern Draa-Tafilat, southern Marrakesh-Safi, far northern Oriental, and far southeastern Tangier-Tetouan-Al Hoceima regions.

• Orange thunderstorm and rainfall warnings: coastal areas of Rabat-Sale-Kenitra and Casablanca-Settat regions.

• Yellow rain, wind, and snow warnings: the rest of the affected area.

Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming days.

Hazardous Conditions
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 the soil has become saturated by heavy rainfall.

Precipitation could fall as snow in the higher elevations over the coming days. Wind gusts could cause blowing and drifting snow; decreased visibility is likely in mountainous areas. Rain-induced landslides cannot be discounted in areas of elevated terrain; there is also the possibility of avalanches in mountainous areas where the snowpack has become unstable due to heavy snowfall. Power outages could occur throughout the affected area.

Transport
Floodwaters and related debris may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around the affected area. Flooding in urban areas could also result in significant traffic congestion. Heavy snow will likely make driving hazardous in some areas; authorities could implement temporary road closures or detours in such locations. Mountain passes and tunnels could be closed as a precautionary measure during periods of intense snowfall.

Advice

Monitor local media for weather-related updates and advisories. Confirm all transport reservations and business arrangements before traveling in the affected area. Seek updated information on road conditions before driving or routing shipments through areas where severe weather is forecast; plan for possible supply chain disruptions throughout the affected areas. Stay away from elevated streams, creeks, and other watercourses that are prone to flash flooding. Do not attempt to navigate flooded roadways. Exercise caution in elevated terrain due to the threat of landslides, as well as mountainous regions where avalanches pose a threat. Charge battery-powered devices in the case of prolonged electricity outages.

Resources

Morocco General Directorate of Meteorology (French)
Algeria National Meteorological Office (French)