Jump to content
Holidays
Local
Radar
Windy?
ARW WeatherMan

Your UV index recordings in the UK & everything else UV related

Recommended Posts

Posted (edited)

I realised we talk a lot about the weather generally, on here and across the UK but one thing that is rarely mentioned is the UV index so my first question is; Do you guys know whether we have ever recorded a UV index of 9 here in the UK? 

I see many places as far north as Nottingham will be hitting 8 next week provided there are clear skies and many times I've known the UV to hit 8 in London, most years we get atleast 7-10 days I'd say but surely somewhere on the south coast will have hit 9 on a few accasions.

I also regularly check www.temis.nl which gives a clear sky UV index forecast which over many years I've come to realise is generally is out by 1UV. They are forecasting 7.5 in London next week which if I'm right would mean 8.5 and surely the south coast could hit 9 by that reasoning? Any thoughts or facts would be interesting to hear. Thankyou :)

Screenshot_20180616-231434.png

Screenshot_20180616-231632.png

Edited by ARW WeatherMan

Share this post


Link to post
Share on other sites

I haven't seen an 8 in a while, usually 7 max. I don't know if we've ever reached 9 here!

Share this post


Link to post
Share on other sites
Posted (edited)

According to the Met Office, UV does not exceed 8 in the UK, and 7 may occur on exceptional days.

Edited by Mapantz
typo

Share this post


Link to post
Share on other sites
1 minute ago, Mapantz said:

According to the Met Office, UV does not exceed 8 in the UK, and 7 is may occur on exceptional days.

This week is our best chance reaching the 9 figure as the sun is 'highest' of the year.

MIA

Share this post


Link to post
Share on other sites

Have experienced 12 in high Himalayan adventures ,your lips go purple 😳

Share this post


Link to post
Share on other sites
Posted (edited)
3 minutes ago, Midlands Ice Age said:

This week is our best chance reaching the 9 figure as the sun is 'highest' of the year.

MIA

True. At the moment, it's looking a cloud-fest here, next week. Both the Met Office and Temis have me down for an index of 7.

The other factor is ozone amounts.

Edited by Mapantz

Share this post


Link to post
Share on other sites

I have spent a lot of time over the years trying to find reliable UK recorded UV data but it is very few and far between 

I'm sure if it was recorded daily across all stations like temperatures are then a UV of 9 would have been recorded somewhere along the south

Share this post


Link to post
Share on other sites
2 minutes ago, ARW WeatherMan said:

The highest ever recorded was 43.3 in Bolivia on an active volcano. Can't imagine how quickly you would burn in them conditions

https://www.livescience.com/46701-andes-highest-uv-index-measured.html

I was there in January fortunately it was dusty  

Share this post


Link to post
Share on other sites

I don't know how reliable it is, but the UV reader on a fairly local Davis VP2 station returns a few 9 readings every year, and plenty of 8s. The 9 readings are always when the weather comes from between S and W with continental airmasses having slightly lower readings.

Share this post


Link to post
Share on other sites
34 minutes ago, MP-R said:

I don't know how reliable it is, but the UV reader on a fairly local Davis VP2 station returns a few 9 readings every year, and plenty of 8s. The 9 readings are always when the weather comes from between S and W with continental airmasses having slightly lower readings.

Interesting! Must be due to cleaner air from the Atlantic 

Share this post


Link to post
Share on other sites

I recall a few April's ago (possibly 2015?) there were higher than usual UV readings for the time of year with 6's and 7's recorded. The Met Office released something about this even though their forecasts were just giving 4's and 5's still.

The higher UV was shown on
 www.temis.nl due to a 'plume' of lower ozone concentration from the SW. I had noticed the site seemed to show more variation in clear-sky UV due to ozone variability, however the Met Office forecasts looked more as if they just use the normal UV for the time of year and expected cloudiness. Can't say if that really was the case though, and they could have improved now.

Given that I'd have thought 9 could have been recorded before but don't know how I'd find out. A nearby Davis stations with a UV sensor show 7.8 as the highest this year (accuracy unknown).


 

Share this post


Link to post
Share on other sites
7 hours ago, Evening thunder said:

I recall a few April's ago (possibly 2015?) there were higher than usual UV readings for the time of year with 6's and 7's recorded. The Met Office released something about this even though their forecasts were just giving 4's and 5's still.

The higher UV was shown on
 www.temis.nl due to a 'plume' of lower ozone concentration from the SW. I had noticed the site seemed to show more variation in clear-sky UV due to ozone variability, however the Met Office forecasts looked more as if they just use the normal UV for the time of year and expected cloudiness. Can't say if that really was the case though, and they could have improved now.

Given that I'd have thought 9 could have been recorded before but don't know how I'd find out. A nearby Davis stations with a UV sensor show 7.8 as the highest this year (accuracy unknown).


 

Yes remember it well because I got very burnt! 

Screenshot_20180617-180154.png

Share this post


Link to post
Share on other sites
18 hours ago, ARW WeatherMan said:

The highest ever recorded was 43.3 in Bolivia on an active volcano. Can't imagine how quickly you would burn in them conditions

https://www.livescience.com/46701-andes-highest-uv-index-measured.html

As quick as 3 minutes! 

http://m.wolframalpha.com/input/?i=UV+Index+43+sunburn

  • Like 1

Share this post


Link to post
Share on other sites

And the aforementioned local station to me got to 8.3 today.

  • Like 1

Share this post


Link to post
Share on other sites
13 hours ago, MP-R said:

And the aforementioned local station to me got to 8.3 today.

Being around the summer solstice and sunny most of next week I shall be keeping a close eye on the reading over the next week or so! Fingers crossed somewhere reaches 9!

Share this post


Link to post
Share on other sites

Met Office going for a UV of 8 up here in Oldham on Friday and next week. That's a pretty strong sun!

  • Like 1

Share this post


Link to post
Share on other sites
Posted (edited)

https://www.wunderground.com

shows a lot of amateur weather stations, some of which have built-in UV measurements.

https://www.wunderground.com/personal-weather-station/dashboard?ID=IOLDHAMC2#history/s20180614/e20180621/mweek (Oldham)

Admittedly some of these reading should be taken with a pinch of salt, but if local stations tend to agree with each other, then they might not be that far off the mark. 

Edited by J10

Share this post


Link to post
Share on other sites
18 hours ago, J10 said:

https://www.wunderground.com

shows a lot of amateur weather stations, some of which have built-in UV measurements.

https://www.wunderground.com/personal-weather-station/dashboard?ID=IOLDHAMC2#history/s20180614/e20180621/mweek (Oldham)

Admittedly some of these reading should be taken with a pinch of salt, but if local stations tend to agree with each other, then they might not be that far off the mark. 

Just looked and Oldham is current 6.9! Still got an hour till it reaches its peak

Share this post


Link to post
Share on other sites

Currently just above 7 here. Sun certainly feels strong.

  • Like 1

Share this post


Link to post
Share on other sites

Judging from how blue the sky is (I have no access to any real measurements) I can't imagine UV levels being much higher than they are today...Anyone lying on beaches - especially if they [the beaches] are made of white sand - need take special care?

  • Thanks 1

Share this post


Link to post
Share on other sites
1 hour ago, Ed Stone said:

Judging from how blue the sky is (I have no access to any real measurements) I can't imagine UV levels being much higher than they are today...Anyone lying on beaches - especially if they [the beaches] are made of white sand - need take special care?

Yes definately! A UV index of 8 in your back garden on grass will be a UV index of 8 

If you're on the beach with the sea and sand then up to 30% of that UV will be reflected back off the ground/water so you'll be looking at 9/10 regardless of what the meter is reading.

 

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×