Today and yesterday have seen quite high UV levels after what has been a
spring season of rather normal UV intensity.

The lack of tropical maritime air masses has probably been responsible.

The UV here today reached 8.6 despite quite cloudy and hazy conditions
with the sun always being partly obscured by haze or cloud. Yesterday's
hazy conditions saw the UV reach 8.0.

I suspect that now the CF has moved through this evening and we're in a
different air mass, the UV maximum tomorrow will be down to around 6.0
to 7.0.

Given the forecast for later this week, we may see an extremely high UV
level of +9.0 on Wednesday. Slip, slop, slap...oooerrrrr.

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