-
Latest Weather News
High pressure for the weekend settling the weather, but remaining on the cool side in the east
A dry, sunny respite in the south today, before a showery end to the week for all tomorrow. High pressure builds in from the Atlantic this weekend, bringing mostly dry conditions with sunshine in the west, but it will remain cloudy and cool in the east Read the full update here
A drier outlook for the weekend but low cloud could scupper hopes of warm sunshine
High pressure is on the way this weekend. The chilly winds will ease but clear nights could still bring a frost. By day, mostly dry but tricky low cloud will affect temperatures. Read the full update here
April showers, sunny spells and nippy nights
Another mixed, cool day with sunny spells and scattered showers. Passing low pressures will bring wind and rain as the nippy nights continue. Read the full update here
Question
Atleastitwillbemild
Hi I had a question about Freezing fog that I don't seem to be able to find the awnsers for by google searching. Its my favourite type of weather phenomenon but I don't get to see it very often in my part of the world (Thames Valley/Marlborough Downs)
We get plenty of fog here, autumn and winter, and there are many frost pockets and hollows but getting frost and fog at the same time always seems to be rare. I know freezing fog is brought about obviously by sub zero temperatures and areas of clear high pressure in winter, by why is that some clear some frosty highs produce freezing fog occaisonally while many more usually don't?
What are the exact conditions needed for it to form other than clear highs and very low temps?
During December 2010 we had almost 3 weeks of lying snow under both cloudy and clear conditions and freezing fog formed on only one of those nights. It was neither the mildest or the coldest night either. I see a lot of people mention on forums when looking at certain charts that due to what they see, freezing fog could definitely be a risk. What is it about a particular chart that makes a cold frosty high more likely to produce FF than another? It would be a great help if anyone could explain the partiuclar conditions that create the right sort of environment for FF to occur locally. Does it have to do with relative humidity? direction of source of cold air? How moist the ground is?
Thank you for any helpful explanation.
Link to comment
Share on other sites
8 answers to this question
Recommended Posts
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 accountSign in
Already have an account? Sign in here.
Sign In Now