Warning from the meteorological organization to climbers, according to the announcement of this organization, on Thursday and Friday the activity of the rainfall system will be extensive in the western half of the country, in the northwest of the mountain, in the Alborz and Zagros plateaus with showers and thunderstorms, hail pollution and fog (reduction of horizontal and vertical visibility) and in snow, snow and floods, snow and blizzards. Floods and rockfalls downstream.