Someone on the Weather and Climate Google Group asked me to produce a list of the 50 warmest daily anomalies in the Central England Temperature [CET] series in a similar manner to how I produced a list of the 50 hottest days since 1878, and so here it is!
So there were nine entries in the top fifty that have occurred since 2001, but surprisingly to me, an April was in top spot, the 3rd of April 1946 to be precise, with an anomaly of +13.6°C for that day, closely followed by the 3rd July 1976 (+13.2) and the 9th of August 2003 (+12.8). This is the chart of the 3 April 1946 courtesy of Wetterzentrale, so obviously a very warm spring day in an anticyclonic SE’ly.
Also noticeable was the 29th of March 1965, with a remarkable range in anomalies of -2.2°C minimum to +11.5°C maximum. The actual temperature range was 21.5°C from a minimum of +0.7°C to a maximum of 22.2°C in the day.