This current very mild spell has been threatening to break a daily CET record all week and it finally managed it yesterday (9 December 2016). Yesterday’s maximum of 13.5°C (provisional) exceeded the previous warmest 9th December by 0.8°C in the daily CET series that started in 1878. Yesterday was just over +6°C warmer than the 1961-1990 long-term average for that day.
The maximum anomaly for the last three days of CET (7-9 December) have all been round the +6°C mark, and yesterday the minimum anomaly was a massive +8.6°C above the long-term average. The last five days have seen a remarkable turnaround in daily CET values from cold on Monday to record mild by Friday.