Look I don't keep local rcords okay, but something different has just
happened , something on an October nightI can't say I've seen since at
least 1995 in the SE of London.Obviouisly statistically there's a good
chance I may be wrong but I've just seen off my son at these wee hours of
the morning and I was taken aback at just how cold the night air was , in
fact when I checked the roof of my car there was ICE. Is this something
special or am I just too sensitive

in 60237 20091018 041210 "Lawrence Jenkins" wrote:
Look I don't keep local rcords okay, but something different has just
happened , something on an October nightI can't say I've seen since at
least 1995 in the SE of London.Obviouisly statistically there's a good
chance I may be wrong but I've just seen off my son at these wee hours of
the morning and I was taken aback at just how cold the night air was , in
fact when I checked the roof of my car there was ICE. Is this something
special or am I just too sensitive

My brother-in-law was scraping ice off his car at 7:30 am yesterday,
a few miles west of Exeter.

Will Hand wrote:

Min +1.3C in Haytor even (and we are not prone to radiation frost being
elevated).

Will, could you please explain this for beginners like me.

Hugh

--

Hugh Newbury

www.evershot-weather.org

On 18 Oct, 08:43, Hugh Newbury wrote:
Will Hand wrote:
Min +1.3C in Haytor even (and we are not prone to radiation frost being
elevated).

Will, could you please explain this for beginners like me.

Hugh

--

Hugh Newbury

www.evershot-weather.org

Minimum + 2.7c in Wanstead, East London. Grass minimum +1.7c

Hugh Newbury wrote:

Will Hand wrote:

Min +1.3C in Haytor even (and we are not prone to radiation frost being
elevated).

Will, could you please explain this for beginners like me.


The ground cools through radiation as elsewhere and thus the air in contact
with the ground is cooled. However, the cold air then drains off the hill.

--
Graham P Davis, Bracknell, Berks., UK. E-mail: newsman not newsboy
"I wear the cheese. It does not wear me."

Graham P Davis wrote:
Hugh Newbury wrote:

Will Hand wrote:

Min +1.3C in Haytor even (and we are not prone to radiation frost being
elevated).
Will, could you please explain this for beginners like me.


The ground cools through radiation as elsewhere and thus the air in contact
with the ground is cooled. However, the cold air then drains off the hill.


Of course! V many thanks for the helpful explanation. I think that may
be happening here too. Min last few nights: 15th (9.9C), 16th (2.3C),
17th (1.3C).

Hugh

--

Hugh Newbury

www.evershot-weather.org

On Sun, 18 Oct 2009 11:14:48 +0100, Graham P Davis wrote in


Hugh Newbury wrote:

Will Hand wrote:

Min +1.3C in Haytor even (and we are not prone to radiation frost being
elevated).

Will, could you please explain this for beginners like me.


The ground cools through radiation as elsewhere and thus the air in contact
with the ground is cooled. However, the cold air then drains off the hill.

And it's in these conditions that valley bottoms can be several degrees
colder than hill/mountain tops at night.

--
Mike Tullett - Coleraine 55.13°N 6.69°W posted 10/18/2009 10:39:07 AM GMT

Mike Tullett wrote:
On Sun, 18 Oct 2009 11:14:48 +0100, Graham P Davis wrote in


Hugh Newbury wrote:

Will Hand wrote:

Min +1.3C in Haytor even (and we are not prone to radiation frost being
elevated).
Will, could you please explain this for beginners like me.

The ground cools through radiation as elsewhere and thus the air in contact
with the ground is cooled. However, the cold air then drains off the hill.

And it's in these conditions that valley bottoms can be several degrees
colder than hill/mountain tops at night.


Another factor occurs here. My house is on a slope towards the N and E,
so the garden sheds its frost in those directions (I purposely left a
gap in the hedge at the bottom of the garden). But the houses on the
opposite (South) side of the street prevent the frost leaving their
gardens and have complained the last few nights of the frost, which has
evidently piled up against their houses. QED!

Hugh

--

Hugh Newbury

www.evershot-weather.org

"Lawrence Jenkins" wrote :

Look I don't keep local rcords okay, but something different has just
happened , something on an October nightI can't say I've seen since at
least 1995 in the SE of London.Obviouisly statistically there's a good
chance I may be wrong but I've just seen off my son at these wee hours of
the morning and I was taken aback at just how cold the night air was , in
fact when I checked the roof of my car there was ICE. Is this something
special or am I just too sensitive
FMS (Faulty Memory Syndrome) at work, Lawrence. Don't
worry; most people suffer from it.

The average date for the first radiation frost (used to be called 'ground
frost', is sometimes - bizarrely - called 'grass frost' by the present
generation of weather preseneters, but in fact the effects can be
seen on cars and other freely-radiating objects) in and around Penge
is about 10 October, with a range from 24 August to 26 November.
The average and extreme dates for air frost are, very roughly,
about three weeks later.

Philip

"Philip Eden" philipATweatherHYPHENukDOTcom wrote in message
...
"Lawrence Jenkins" wrote :

Look I don't keep local rcords okay, but something different has just
happened , something on an October nightI can't say I've seen since at
least 1995 in the SE of London.Obviouisly statistically there's a good
chance I may be wrong but I've just seen off my son at these wee hours of
the morning and I was taken aback at just how cold the night air was , in
fact when I checked the roof of my car there was ICE. Is this something
special or am I just too sensitive
FMS (Faulty Memory Syndrome) at work, Lawrence. Don't
worry; most people suffer from it.

The average date for the first radiation frost (used to be called 'ground
frost', is sometimes - bizarrely - called 'grass frost' by the present
generation of weather preseneters, but in fact the effects can be
seen on cars and other freely-radiating objects) in and around Penge
is about 10 October, with a range from 24 August to 26 November.
The average and extreme dates for air frost are, very roughly,
about three weeks later.

Philip


Well that may be true Philip bit it's the earliest I can remember for the
past ten years. I usually notice these sorts of things