[Wide-scale rain and snow will enter the strongest period from tomorrow, and temperatures in most parts of the north will reach new lows] October 16th, from today (October 16th) to 19th, cold air will affect the middle and lower reaches of the Yangtze River and most of the areas north of it from west to east. The highest temperatures in eastern Northwest China, North China, Huanghuai and other places will set new lows in the second half of this year. At the same time as the temperature drops, large-scale precipitation will also appear, and many places in the north will experience heavy rainfall that is rare during the same period. Tomorrow will be the strongest period of this round of precipitation, and the scope of heavy rain will significantly expand.