Weather warning for Tehran; Rain and snow from Thursday and a drop in temperature of 7 degrees The meteorological organization announced the activity of the rain system in the Tehran district through a yellow level warning. Accordingly, from the afternoon of Thursday November 5 to Sunday November 8, mainly in the western and northern half of the province, rain, showers and thunderstorms, thin fog and strong temporary winds are expected. There is a possibility of hail in some areas, and in the heights and peaks rain and snow, a blizzard at night, fog, strong to very strong wind and the possibility of lightning are expected. Slippery crossings and roads, reduced visibility due to fog, disruption of urban and interurban traffic, flooding of some roads and flowing water will be some of the possible consequences of this rainy system.