Analysis of Weather Anomalies to Assess the 2021 Flood Events in Yaounde, Cameroon (Central Africa)

Extreme weather anomalies such as rainfall and its subsequent flood events are governed by complex systems interactions between them. It is important to understand the drivers of it helps prepare for mitigate or respond related impacts. In line with above statements, quarter-hourly data year 2021 recorded in Yaounde meteorological station were synthesized come out daily dekadal (10-day averaged) six climate factors (rainfall, temperature, insolation, relative humidity, dew point wind speed), order assess occurrences severity floods changing patterns Yaounde. addition, Precipitation Concentration Index (PCI) was computed evaluate distribution analyse frequency intensity precipitation. Coefficient variation (CV) used estimate seasonal annual patterns, while Mann-Kendall (MK) trend test performed detect (12-month period variation) from January 1st December 31st 2021. The Standard (SPI) also quantify deficiency observed time scale. Results reveal that based on historical 1979 2018 bimodal forest zone, maximum minimum temperature averages mostly average values. Precipitations rare during dry seasons, range value 0 - 13.6 mm great season 21.4 small season. Whereas rainy rainfalls regular varying 50 mm, 90.4 respectively. MK showed there a statistical significant increase month August at 5% level significance, decreasing July December. There strong irregular months February, 2021, being mildly wetted all seasons extremely August. Recorded flooding days within study matched heavy including seasons.