West and Central Africa: 2025 Flooding Outlook (08–12 July)
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In the next 5 days, heavy rainfall generated by deep convective clouds is expected in Guinea, Sierra Leone, Nigeria, and Cameroon.
- Extreme rainfall (accumulated over the next 5 days): not expected
- Heavy rainfall (100-150mm): is very likely in western Guinea, most parts of Sierra Leone, central, and southern Nigeria, central, and southwestern Cameroon.
- Moderate rainfall (50-100mm): is very likely in southeastern Senegal, southern Mali, eastern Guinea Bissau, central, northern, and eastern Guinea, western Liberia, northwestern Côte d'Ivoire, northern, and central Nigeria, eastern, and southern Cameroon, southern Chad, northern Central African Republic, and northeastern Democratic Republic of the Congo
Explanation of concepts
Moderate rainfall: refers to a 5-day cumulative precipitation in the range of 50mm to 100mm
Moderate rainfall can cause flood in urban areas with poor infrastructure, or localities with saturated soil, the moderate rainfall can be benefit for Agriculture and Water supply.
Associated Hazards: Moderate rainfall, flash flood, riverine flooding, landslides, soil erosion likely.
Heavy rainfall: refers to a 5-day cumulative rainfall in range of 100mm to 150mm.
Heavy rainfall can lead to flooding, landslides, agricultural damage, infrastructure failure, displacement, and public health crises.
Associated Hazards: Heavy rainfall, flash flood, riverine flooding, landslides, soil erosion and lightning, strong winds.
Extreme rainfall: refers to very intense or prolonged precipitation with 5-day cumulative precipitation exceeding 150mm
Extreme rainfall can trigger multidimensional disasters, with impacts spanning from flash floods and landslides to economic losses, infrastructure collapse, and public health emergencies.
Associated Hazards: Extreme heavy precipitation, flash flood, riverine flooding, landslides, soil erosion and lightning, strong winds, severe thunderstorms.