On checking what the pyrgeometer at Chilbolton Observatory was showing for yesterday I found something unusual.
It looks like dense low level mist formed just after midnight, the red line above and eventually dissipated.
Here are the pertinent plots.
These were obviously very calm conditions, perhaps I ought to collect a matching synoptic as well. Cloud radar was not working.
The mist was slightly warmer.
There seems to have been a slight change in wind and the mist dissipated or moved way. I know the land is fairly flat thereabouts and there is a river not far away (Hampshire Test). (gorgeous part of the country, rural Hampshire, pretty villages). There might be just enough hill nearby to allow valley bottom fog.
The above is my interpretation whilst the situation is in mind. Feel free to disagree.
If these posts as the interest situation arises are annoying anyone, please speak up, not that I expect to do many. I’ve kept most of the graphics off the front page. I could provide a zip instead.
Post by Tim Channon