Freezing rain air at the surface within the region of high pressure. The warm air from the Gulf of Mexico is often the fuel for freezing precipitation. Freezing rain develops when falling snow encounters a layer of warm air aloft, typically around the 800 mbar (800 hPa) level, causing the snow to melt and become rain. As the rain continues to fall, it passes through a layer of subfreezing air just above the surface and cools to a temperature below freezing (). If this layer of subfreezing air is sufficiently deep, the raindrops may have time to freeze into ice pellets (sleet)
Alexandria rainy winters and moderately hot summers that, at times, can be very humid; January and February are the coolest months, with daily maximum temperatures typically ranging from and minimum temperatures that could reach . Alexandria experiences violent storms, rain and sometimes snow, sleet and hail during the cooler months; these events, combined with a poor drainage system, have been responsible for occasional flooding in the city. July and August are the hottest and driest months of the year, with an average daily maximum temperature of . The average annual rainfall is around but has been as high as Port Said,