On Wednesday, June 10, 2015 at 10:42:28 AM UTC+1, Nick Gardner wrote:
Just noticed that the Met Office is forecasting 'VERY HIGH' UV for
today. They have an Index of 8 for Sidmouth. I don't think I've seen
that before.

But this leads me to ask why do they think the UV will be high today? I
would have thought tomorrow should be higher but they have the UV down
to 6 for Thursday.

The UV is currently 4.8 (10:33) and about where it was yesterday at this
time. Yesterday's UV peaked at 7.3.

This month's UV high so far was 8.9 on the 2nd. The Met Office missed
that one.

--
Nick Gardner
Otter Valley, Devon
20 m amsl
http://www.ottervalley.co.uk

It's sunny, it's near the longest day, that's the way they work. Anybody that records or observes UV reading knows the UV forecasts are simply rubbish..

St Martin's Scilly has been over 9 several times this year, always in humid air with high pressure to the south or SW, never to the north. 10 was recorded in patchy sea fog back in May. Today it's reached 7.3, lower than many recent days, in fact lower than the average this month. As it's now 13:30 it's unlikely to little if at all.

One thing that irritated me about yesterday's Spotlight forecast was the statement blandly blaming the wind for the below average temperature, we were told "If it hadn't been windy it would have been in the 20s" Strange it wasn't in the 20s anywhere (officially)yesterday then, plenty of places were sunny & not windy.

My warmest ever May day is 24.4C, very high temperatures don't happen here in May due to cold sea. It last reached 24C on 25th May 2012 when it was windier here than it was yesterday and the wind was from much the same direction, surely the very different source of the air couldn't be the reason?!

I think DBs getting very careless with his throw away generalisations. Just stick to trying to forecast the weather.

Graham
Penzance