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TimS
  • TimS
  • Advanced Member
25 June 2020 08:00:37
This is largely down to ozone depletion this last winter. The record strong polar vortex led to the worst ozone hole ever in this hemisphere. This despite the fact stratospheric ozone globally is starting to recover from its decades long decline.

We have a particularly holey bit over us at the moment, plus it’s clear and midsummer.

Pollution down, but levels have been picking up in recent days so I doubt that’s a big contributor. I can see an urban smog line over London this week for the first time in a while.
Brockley, South East London 30m asl
Bertwhistle
25 June 2020 09:45:09

Just got an alert to say that we could see record UV levels today.

Can anyone explain why this record could be broken?

I get it’s sunny and we have just past the solstice. But I assume we have had similar conditions before.

Originally Posted by: Heavy Weather 2013 


 


Matt Taylor just said the very same on BBC forecast.


Bertie, Itchen Valley.
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picturesareme
25 June 2020 12:25:42
widespread 9's currently on met map for coastal south west
Retron
25 June 2020 17:14:15
The Beeb has an article about it all here. Nothing new, but interesting to see in the mainstream media.
https://www.bbc.co.uk/news/explainers-53178988 
Leysdown, north Kent
Bertwhistle
26 June 2020 10:12:02

9s are gone from the map today, but both Lerwick and Sell Ness in Shetland are offered 7s!


Bertie, Itchen Valley.
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Bertwhistle
05 July 2020 15:02:34

The 8s seem to have condensed for the time being, but there are still 9s forecast tomorrow in the Channel isles:


https://www.metoffice.gov.uk/public/weather/forecast/map/gcp1by0nd#?map=MaxUVIndex&fcTime=1593993600&zoom=8&lon=-4.34&lat=49.75


Bertie, Itchen Valley.
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Retron
05 July 2020 16:55:17


The 8s seem to have condensed for the time being, but there are still 9s forecast tomorrow in the Channel isles:


Originally Posted by: Bertwhistle 


FWIW, there was an 8 on the forecast for Kent today, including Leysdown - it only appeared in the forecast late yesterday. One of those deceptive days, as the wind and low humidity would have made it not feel as strong!



Leysdown, north Kent
Bertwhistle
06 July 2020 13:59:28

Chilton has managed four 8+ this month, with 8.8 yesterday; Camborne just reached 9 today.


 


Bertie, Itchen Valley.
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Bertwhistle
06 July 2020 14:00:30


 


FWIW, there was an 8 on the forecast for Kent today, including Leysdown - it only appeared in the forecast late yesterday. One of those deceptive days, as the wind and low humidity would have made it not feel as strong!



Originally Posted by: Retron 


You out with the wolves still, getting burnt up?


Bertie, Itchen Valley.
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Bertwhistle
18 July 2020 09:38:11

Met O still promising some VH 8s over the coming week, with Guernsey still showing 9 on Monday.


Catch up since 7th.


Only 2 interesting readings from Reading: 8.3 on 13th and 17th.


Since 7/7 Chilton's readings were as follow (best was 9.1 yesterday)


6.5


4.6


5.2


7.5


7.7


8.4


8.6


6.9


7.4


8.4


9.1 yesterday. 


Bertie, Itchen Valley.
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Retron
18 July 2020 09:51:12


You out with the wolves still, getting burnt up?


Originally Posted by: Bertwhistle 


Due to distancing rules at the wolf centre (max of 6 people), I can't get there that often - luckily for me last time I was there (early July) it was cloudy. I'm not there again until August and I'll be hoping it's cloudy again.


I've never been burnt at the wolf centre though, even in years past, as I use factor 50 sunblock. Luckily it doesn't seem to distract the wolves, it must reek to them!


Leysdown, north Kent
Bertwhistle
26 July 2020 10:10:16

Quite exceptional for the end of July, 8s forecast up to Oxon and Herts on Thursday, still 8s on Friday. Will we get a first August 8?


Bertie, Itchen Valley.
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26 July 2020 10:33:39

Despite yesterday being quite gloomy there was a brief bright spell just after midday and I recorded a figure of 7.3.


Will be interesting to see if an 8+ figure is reached later this week.


I haven't checked all my data for this year but it looks like I have only exceeded a reading of 8 once which was 8.1 on 16 July.

Bertwhistle
30 July 2020 14:25:35

Camborne 8.7 and 8.3 yesterday & today.


Chilton 8.6 both days.


Reading lower yesterday, but 7.7 today.


Last days of VH.


Bertie, Itchen Valley.
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Retron
03 August 2020 16:46:35


Quite exceptional for the end of July, 8s forecast up to Oxon and Herts on Thursday, still 8s on Friday. Will we get a first August 8?


Originally Posted by: Bertwhistle 


Maybe?



Leysdown, north Kent
Bertwhistle
03 August 2020 18:25:59


 


Maybe?



Originally Posted by: Retron 


I am lost for words!


May not come to fruition of course, but amazing to see it forecast.


 


Bertie, Itchen Valley.
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Bertwhistle
08 August 2020 19:04:57


 


I am lost for words!


May not come to fruition of course, but amazing to see it forecast.


 


Originally Posted by: Bertwhistle 


Well, Chilton managed an 8, just, on 1st and 5th.


Bertie, Itchen Valley.
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Bertwhistle
17 August 2020 13:10:49

Chilton managed a 7 today, which is very late. First one since 7th, and before that a 7.5 on 6th.


Two weeks from now 6 will be unlikely.


Bertie, Itchen Valley.
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Bertwhistle
01 September 2020 17:24:01

August updates from Chilton:


6.6 on 20th


6.5 on 23rd


6.3 on 25th


6.0 on 28th


Less than 6 since.


Amazing how the UV plummets in August.


Bertie, Itchen Valley.
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Bertwhistle
07 September 2020 18:33:55

Respectable UV from Chilton for the start of Sep; since 2nd:


5.0  4.0  4.2  5.5  5.3  4.5


Camborne managed a 5.8 on 6th.


Reading is far out of line with the other two and has missing data.


Bertie, Itchen Valley.
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Bertwhistle
20 September 2020 12:03:10

Excellent sunshine September in the S as far as UV goes:


Reading & Chilton have not failed to reach 4 since I last reported on 7th, (up to yesterday). Chilton's 6.0 on 9th and 5.1 on 13th are worthy of note. Add: Chilton has had no sub-4 day through the whole of September so far, including today. Must be a first.


Camborne meanwhile has dipped below 4 on 5 days since then and below 3 on 3 days, due to less sunny weather, but managed 6.2 on 8th and an impressive 5.0 on 18th.


Gib still topping 8 on occasion.


Bertie, Itchen Valley.
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Bertwhistle
19 October 2020 18:35:07

Chilton scored 3.9 on 27th Sep and an impressive 3.6 on 7th October- the last 3 in fact. Disappointing lack of 2s since then though. 2s really should be waning over the next week.


Bertie, Itchen Valley.
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Bertwhistle
24 November 2020 12:11:19

2.3 in fact on 19th and only two 2s since; 2.0 on both 23rd and 26th. Running around 1.5 at Chilton of late.


Bertie, Itchen Valley.
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Bertwhistle
09 January 2021 17:08:48

A reflection on the second half of the year, from Chilton data.


Last UV 2 26/10 (close to usual)


Last 3 7/10 (close tousual)


Last 4 22/9 (close to usual)


Last 5 13/9 (slightly later than usual)


Last 6 9/9 (later than usual)


Last 7 17/8 (later than usual)


Last 8 5/8 (significantly later than usual)


Last 9 17/7 (unusual)


High 9.3 on 29/6.


 


I wonder if the lockdown/ partial lockdown arrangements had an effect on UV levels from June to September. Everything seemed to return to normal from mid September.


Bertie, Itchen Valley.
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Bertwhistle
06 February 2021 08:08:54

Up to 1.6+ in Weybourne yesterday but the first 2s are forecast for today in the Channel Isles. 


Bertie, Itchen Valley.
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