On Feb 16, 9:44 am, Ian wrote:

Reverted subject to T's original.
What was point of changing it Mike?

Because it was still on the subject of the weather and yet off the
thread topic.

Also I cross posted it to a car group as there will be a lot of frost
around until the end of the month and for all I know from looking at
the phases, until the third week in March:
http://sunearth.gsfc.nasa.gov/eclips...se2001gmt.html

Who knows what use the info might provide there? It could be useful.
I'd like to know if I had to get up an half hour earlier to deal with
a frozen windscreen or worse. If I was burning old chip fat I'd be
especially interested.

On Feb 16, 11:14 am, Conor wrote:
In article 14a70221-85b4-463d-bc43-2e50cf7b54fc@
60g2000hsy.googlegroups.com, Weatherlawyer says...



Ian wrote:
On 16 Feb, 07:37, "T" wrote:
Sorry this is a rather lazy question.

I planned to test out my brand new DSLR in the Wey Valley at sunrise this
morning but overslept. ?Did any hardy souls out there see much hoar frost
worthy of early trip tomorrow ? ?My back garden station (Burpham, Surrey)
indicated a min of -5.4c last night so no lack of cold air.

Air is too dry for heavy hoar deposits, probably be the same
on Sunday morning. Have fun setting that alarm for 05:00z

It's usually chilliest just at dawn, or just after is it not?

No. It's between 4-5am.

There must be a reason why it feels colder at dawn then. Would it be
regionally specific, I wonder?

As the frost forms around 4 to 5 am, the latent heat is swept away
according to the laws of physics. On a calm morning it will get
momentarily warmer and just at about the time most people become aware
of it, the temperature drops back down to the pre latent heat
temperature?

Whatever the reason, there has to be reason.

As a Brit I'd like to thank the Americans for their help in the war
against terror because if they'd not funded the IRA for 30 years, we
wouldn't know how to deal with terrorists.

They only stopped funding terrorism in Britain because Tory BLiar
promised to terrorise Iraq.

In that TV show that took the lid off the causes of the war about a
year ago, he looked like he'd just been freshly buggered. Must have
been when the impact of what he'd agreed to behind our backs hit home.

On Feb 16, 11:14*am, Conor wrote:
In article 14a70221-85b4-463d-bc43-2e50cf7b54fc@


It's usually chilliest just at dawn, or just after is it not?

No. It's between 4-5am.

--
Conor

Sorry, this just isn't true. It is coldest soon after sunrise
and I have 24 year's thermograph traces to prove it. There is no
reason why the temperature should rise before sunrise in the absence
of any change of wind or cloud.

Tudor Hughes, Warlingham, Surrey.

In article 0a3f3efd-bc21-4133-80b5-38324838c4f6
@k2g2000hse.googlegroups.com, Tudor Hughes says...
On Feb 16, 11:14*am, Conor wrote:
In article 14a70221-85b4-463d-bc43-2e50cf7b54fc@


It's usually chilliest just at dawn, or just after is it not?

No. It's between 4-5am.

--
Conor

Sorry, this just isn't true. It is coldest soon after sunrise
and I have 24 year's thermograph traces to prove it. There is no
reason why the temperature should rise before sunrise in the absence
of any change of wind or cloud.

Yebbut that doesn't take into account windchill.

I've spent years being at work at that time.


--
Conor

As a Brit I'd like to thank the Americans for their help in the war
against terror because if they'd not funded the IRA for 30 years, we
wouldn't know how to deal with terrorists.

On Feb 16, 2:50 pm, Tudor Hughes wrote:
On Feb 16, 11:14 am, Conor wrote:

In article 14a70221-85b4-463d-bc43-2e50cf7b54fc@

It's usually chilliest just at dawn, or just after is it not?

No. It's between 4-5am.

Sorry, this just isn't true. It is coldest soon after sunrise
and I have 24 year's thermograph traces to prove it. There is no
reason why the temperature should rise before sunrise in the absence
of any change of wind or cloud.

I've always thought that on occasions such as this spell and the last
one, calm, sunny, frosty mornings it gets intensely cold at dawn. But
so many people who, as far as I know, have years of data have
countered that statement in times past, I just went with it.

Without agreeing.

Check your thermograph against the list of lunar dates provided and I
am almost certain you'll be pleasantly surprised. Unless you are
Richard Dixon.

Or Conor?

On Sat, 16 Feb 2008 06:50:39 -0800 (PST), Tudor Hughes
wrote:

On Feb 16, 11:14*am, Conor wrote:
In article 14a70221-85b4-463d-bc43-2e50cf7b54fc@


It's usually chilliest just at dawn, or just after is it not?

No. It's between 4-5am.

--
Conor

Sorry, this just isn't true. It is coldest soon after sunrise
and I have 24 year's thermograph traces to prove it. There is no
reason why the temperature should rise before sunrise in the absence
of any change of wind or cloud.


Of course there is - the central heaing comes on at 7 am!

--

Ian D

On Feb 16, 8:02 pm, Ian Dalziel wrote:
On Sat, 16 Feb 2008 06:50:39 -0800 (PST), Tudor Hughes



wrote:
On Feb 16, 11:14 am, Conor wrote:
In article 14a70221-85b4-463d-bc43-2e50cf7b54fc@

It's usually chilliest just at dawn, or just after is it not?

No. It's between 4-5am.

--
Conor

Sorry, this just isn't true. It is coldest soon after sunrise
and I have 24 year's thermograph traces to prove it. There is no
reason why the temperature should rise before sunrise in the absence
of any change of wind or cloud.

Of course there is - the central heaing comes on at 7 am!

Ford Transits don't have central heating, fool.

On Feb 17, 12:02 am, Weatherlawyer wrote:
On Feb 16, 8:02 pm, Ian Dalziel wrote:

Of course there is - the central heaing comes on at 7 am!

Ford Transits don't have central heating, fool.

I wish they did though. No sooner do I get the ice shifted off the
outside than the inside clouds over and needs scraping.

Buggrit millenium hand and shrimp!

Started first time though.

Weatherlawyer wrote:

On Feb 16, 8:02 pm, Ian Dalziel wrote:
On Sat, 16 Feb 2008 06:50:39 -0800 (PST), Tudor Hughes



wrote:
On Feb 16, 11:14 am, Conor wrote:
In article 14a70221-85b4-463d-bc43-2e50cf7b54fc@

It's usually chilliest just at dawn, or just after is it not?

No. It's between 4-5am.

--
Conor

Sorry, this just isn't true. It is coldest soon after sunrise
and I have 24 year's thermograph traces to prove it. There is no
reason why the temperature should rise before sunrise in the absence
of any change of wind or cloud.

Of course there is - the central heaing comes on at 7 am!

Ford Transits don't have central heating, fool.

Bzzt wrong. Som Ford Transits have central heating.

http://www.usedcarmart.co.uk/1997_fo..._swb-o33115-en
html

In article 9af7e238-4379-4d49-817c-802ca6cfbbf9@
72g2000hsu.googlegroups.com, says...
Buggrit millenium hand and shrimp!

I know what you read.
--
Carl Robson
Audio stream: http://www.bouncing-czechs.com:8000/samtest
Homepage: http://www.bouncing-czechs.com