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https://www.metoffice.gov.uk/hadobs/hadcet/data/maxtemp_ranked_monthly.txt
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12.6 to the 14th
1.4 above the 61 to 90 average
1.5c above the 91 to 20 average
12.5 to the 15th
1.3 above the 61 to 90 average
1.4c above the 91 to 20 average
12.6 to the 17th
12.5 to the 18th
1.4c above the 61 to 90 average
12.6 to the 19th
12.6 to the 20th
1.5 above the 61 to 90 average
12.7 to the 21st
1.6c above the 61 to 90 average
12.6 to the 22nd
1.5c above the 61 to 90 average
1.2c above the 91 to 20 average
1.0c above the 91 to 20 average
With 850s at just 2°C and long fetch westerlies, a late May day like this would manage about 14-15°C max at surface formerly. I think the record SSTs off SW Ireland has not only modified the source air but done something important to the ELR meaning the air is not as unstable as it might be. Not seen a tephigram but the way the cumulus is flattening rather than towering in this very strong sunshine would attest to this. So we reached 20 on a day that should not have. I'm sure the dry ground has contributed a few of those degrees too.
Originally Posted by: Bertwhistle
That's interesting, as at this time of year my rule of thumb is to add 18 to the 850s - as it's really quite hard to *not* get 20 in sunshine these days from late May all the way through to September.
Originally Posted by: Retron
I agree. By 'formerly' I was thinking of typical days in the 80s and 90s. and then it was only my records of our local weather. I was reading manually from a glass thermometer in a screen down the garden too.
Interested in your 'add 18' thought: I remember someone on TWO saying once there was a general add 10 to 15 and I wondered how that could apply at all times of the year.
I also note that we had a warm start yesterday after the frontal cloud went through overnight so that would play a part but what really interested me was all day, it looked and felt as if the cloud should be growing into showers but they never developed vertically or spread and joined as they might with an inversion and so the sunshine was there most of the time. Had I misjudged the buoyancy of the air perhaps?
12.7 to the 25th
1.1c above the 91 to 20 average
12.7 to the 26th
12.7 to the 27th
HadCET 12.9°C to 29th, so still on track for 13.
Arse
Martin
Home: St Helens (26m asl) Work: Manchester (75m asl)
A TWO addict since 14/12/01
"How can wealth persuade poverty to use its political freedom to keep wealth in power? Here lies the whole art of Conservative politics."
Aneurin Bevan
Originally Posted by: Saint Snow
The cheek of it!
It hit a bum note with me.
Formerly of, Birdlip, highest village in the Cotswolds and snow heaven in winter; Hawkinge in Kent - roof of the South downs and Isles of Scilly, paradise in the UK.