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7 hours ago, bluearmy said:

 Viewing the mean heights rather than the anoms is a little more revealing 

A92D6292-3818-48C9-9967-0D5D3780464A.thumb.jpeg.e536662f32dfee5deaadef76096d4b3a.jpeg

My point exactly that i made on the strat thread recently, even with an orange anomaly over Greenland, it still is low pressure, although i am not quite sure how to read your chart but im presuming its low heights over Greenland based on what you have said.

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23 hours ago, feb1991blizzard said:

My point exactly that i made on the strat thread recently, even with an orange anomaly over Greenland, it still is low pressure, although i am not quite sure how to read your chart but im presuming its low heights over Greenland based on what you have said.

Not sure what went wrong but here is the mean slp for the period

8A1EABC8-03D0-4B21-B7B9-AB47EC4F97C8.thumb.jpeg.57a15ad6acb47f2174ab3820e92a0ff2.jpeg 

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4 minutes ago, bluearmy said:

Not sure what went wrong but here is the mean slp for the period

8A1EABC8-03D0-4B21-B7B9-AB47EC4F97C8.thumb.jpeg.57a15ad6acb47f2174ab3820e92a0ff2.jpeg 

Right,so it was weak high pressure then, not sure what that legend represents then, that looks like the anomaly.

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Feb-Mar is an interesting time for temperature records in the UK; every week the day length increases by nearly half an hour in the south and more than that in the north, which means the potential maximums increase at a considerable rate. While they're generally in the mid-high teens for mid-late Feb, by mid-March they're in the mid-20s!

So every week - or even few days - earlier that a monthly record is set, the more impressive it is. Makes the Feb 1998 records all the more impressive; almost 20*C on 13th of the month and without a foehn wind involved really is sensational. The same conditions a week later probably would have topped 20*C, and a week after that got somewhere close to 22*C.

For fun, just imagine if the southeast had a mountain range aligned west-east... the Feb record would probably be in the mid-20s 🤪.

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On 16/02/2019 at 21:36, bluearmy said:

Not sure what went wrong but here is the mean slp for the period

8A1EABC8-03D0-4B21-B7B9-AB47EC4F97C8.thumb.jpeg.57a15ad6acb47f2174ab3820e92a0ff2.jpeg 

What went wrong were the selections for the plots!

This is the composite mean SLP for the full period -

-631778749_SLP181201-190210.thumb.gif.11785de25f6bd058f68e4fc9752e538f.gif

and here is the mean 500mb geopotential -

918413711_z500181201-190210.thumb.gif.b42fbfeaf53c4aa37bf710d46a261b63.gif

Edited by Interitus
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2 hours ago, Man With Beard said:

Anyone who'd flown into the UK after a week away would swear this was a wind up

 

Outside chance of the all time UK record going today 19.7c to beat

Could this be the day we finally get a 20c day in winter?!

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Ah. those were the days. Hey ho said Rowley

 

Edited by knocker

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Sometimes I forget just how much the moisture and latent release potential offered by ocean waters comes into deep cyclogenesis; without recalling the restrictions of being well inland, a 972 mb low formation barely registers on my consciousness!

Proximity to the Rockies should make for some unusually strong flow interactions with the eastern flanks of the mountainous terrain (usually it's the west side bearing the brunt of any such deep lows as they roll in off the Pacific).

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