enso phenomenon

At the end of December, there will be the first cold, damaging cold spell
In the winter-spring season 2018-2019, the time of occurrence is very cold and harmful compared to the average of many years (AMY), ie in the second half of December 2018.
El Nino is strong record, this winter is warm
2015 El Nino lasted the longest in the last 60 years, making this year's winter temperature higher, rainfall across the country plummeting compared to the average of many years.