Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

--
Joe
Wolverhampton

"Joe" wrote in message
...
Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

--
Joe
Wolverhampton

Because the air has not been cooled to it's dewpoint. IIRC, fog will only
form when milder air with a dewpoint 0C moves over snow which then starts
to thaw, drawing heat from the air and cooling it until it reaches it's
dewpoint at which time the fog forms.

--
Pete

Please take my dog out twice to e-mail

---------------------------------------------------------------
The views expressed above are entirely those of the writer and
do not represent the views, policy or understanding of any
other person or official body.
---------------------------------------------------------------

"Joe" wrote in message
...
Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

--
Joe
Wolverhampton

Because the air has not been cooled to it's dewpoint. IIRC, fog will only
form when milder air with a dewpoint 0C moves over snow which then starts
to thaw, drawing heat from the air and cooling it until it reaches it's
dewpoint at which time the fog forms.

--
Pete

Please take my dog out twice to e-mail

---------------------------------------------------------------
The views expressed above are entirely those of the writer and
do not represent the views, policy or understanding of any
other person or official body.
---------------------------------------------------------------

"Joe" wrote in message
...
Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

--
Joe
Wolverhampton

Because the air has not been cooled to it's dewpoint. IIRC, fog will only
form when milder air with a dewpoint 0C moves over snow which then starts
to thaw, drawing heat from the air and cooling it until it reaches it's
dewpoint at which time the fog forms.

--
Pete

Please take my dog out twice to e-mail

---------------------------------------------------------------
The views expressed above are entirely those of the writer and
do not represent the views, policy or understanding of any
other person or official body.
---------------------------------------------------------------

"Joe" wrote in message
...
Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

--
Joe
Wolverhampton

Because the air has not been cooled to it's dewpoint. IIRC, fog will only
form when milder air with a dewpoint 0C moves over snow which then starts
to thaw, drawing heat from the air and cooling it until it reaches it's
dewpoint at which time the fog forms.

--
Pete

Please take my dog out twice to e-mail

---------------------------------------------------------------
The views expressed above are entirely those of the writer and
do not represent the views, policy or understanding of any
other person or official body.
---------------------------------------------------------------

"Pete B" wrote

in reply to the query
Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

Because the air has not been cooled to its dewpoint. IIRC, fog will only
form when milder air with a dewpoint 0C moves over snow which then starts
to thaw, drawing heat from the air and cooling it until it reaches its
dewpoint at which time the fog forms.

That is correct. But in a few days time when warmer Atlantic air (with
higher dewpoints) arrives, then we should see the fog forming readily over
any remaining snow fields.

Jack

"Pete B" wrote

in reply to the query
Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

Because the air has not been cooled to its dewpoint. IIRC, fog will only
form when milder air with a dewpoint 0C moves over snow which then starts
to thaw, drawing heat from the air and cooling it until it reaches its
dewpoint at which time the fog forms.

That is correct. But in a few days time when warmer Atlantic air (with
higher dewpoints) arrives, then we should see the fog forming readily over
any remaining snow fields.

Jack

"Pete B" wrote

in reply to the query
Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

Because the air has not been cooled to its dewpoint. IIRC, fog will only
form when milder air with a dewpoint 0C moves over snow which then starts
to thaw, drawing heat from the air and cooling it until it reaches its
dewpoint at which time the fog forms.

That is correct. But in a few days time when warmer Atlantic air (with
higher dewpoints) arrives, then we should see the fog forming readily over
any remaining snow fields.

Jack

"Pete B" wrote

in reply to the query
Why is it, that with the snow thawing rapidly after it's fallen, with the
high ground temps, that fog or even mist doesn't form?

Because the air has not been cooled to its dewpoint. IIRC, fog will only
form when milder air with a dewpoint 0C moves over snow which then starts
to thaw, drawing heat from the air and cooling it until it reaches its
dewpoint at which time the fog forms.

That is correct. But in a few days time when warmer Atlantic air (with
higher dewpoints) arrives, then we should see the fog forming readily over
any remaining snow fields.

Jack

"Jack Harrison" wrote

That is correct. But in a few days time when warmer Atlantic air (with
higher dewpoints) arrives, then we should see the fog forming readily over
any remaining snow fields.

It's happened here in S.Cambs already. Telephoto view outside my window
he
http://www.itadvice.co.uk/weatherjack/fog.jpg

(will be removed from my server at dusk today)

Jack