Egypt has a hot and dry climate, making it a hyper-arid country, receiving only scant rainfall annually. Most rainfall falls along the northern coast during the winter months (December to February), with the heaviest rainfall recorded in the Mediterranean city of Alexandria. With extreme weather events increasing worldwide due to global warming, Alexandria experienced unusual weather conditions in the early hours of May 31, 2025. Unusually heavy precipitation fell for this time of year, accompanied by strong winds, lightning, and thunder. The storm caused the collapse of some building balconies, damaged numerous buildings and restaurant facades, and brought traffic to a complete standstill. This sudden storm caused widespread panic among the population. This research aims to investigate the causes of this unusual weather event and the factors that contributed to the rapid development of clouds over Alexandria, resulting in rain and hail within a short period of time, through a synoptic study of the atmospheric pressure systems, wind speeds, and directions at various pressure levels up to 200 millibars. We also evaluate the influence of the sea surface temperature on the formation of these Cb clouds over the city. Since this extreme weather event lasted less than an hour and was limited to Alexandria, we compared different types of reanalysis data for rainfall to gain further insights.