Monday, June 02, 2025

HadCET: Warmest Meteorological Spring

Meteorological spring is March to May. (*In the Northern Hemisphere.)

The Hadley Central England Temperature (HadCET) just had the warmest meteorological spring in its 367-year history.

(OK, it's really only 303 years, because some of those early years had temperatures taken inside buildings, etc., not in a systematic fashion, but can you really blame them for trying?)

But still, 303 years. That's pretty impressive.

And this year's March-April-May average saw the warmest temperature anomaly in that little region, 2.26°C, which was the same as last year's value, exactly.

Baseline is 1901-2000.

Still, this year's year-to-date average only ranks 11th highest in all those years.

But things are cooking.

The 10-year moving average for HadCET is at a maximum, 0.52°C higher than 10 years (120 months) ago.

The 50-year linear trend is an impressive 0.31°C/decade.

But it's just a little region in England.

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