An image of the northern sky, taken at midnight (local) on the summer
solstice, is available on my web site via the 'Sights' link, or here
www.buchan-meteo.org.uk/vedute.htm

It was a little cloudy so not quite 'daylight' but by no means dark.


--
Gianna Stefani

www.buchan-meteo.org.uk
(all times are GMT unless otherwise stated)

"Gianna Stefani" wrote in message
...
An image of the northern sky, taken at midnight (local) on the summer
solstice, is available on my web site via the 'Sights' link, or here
www.buchan-meteo.org.uk/vedute.htm

It was a little cloudy so not quite 'daylight' but by no means dark.

I know of this effect as 'dayglow'. Clearly it won't be as pronounced
as at your latitude but for a few weeks around the solstice, even at
1 am (effectively midnight) there is a definite lightening of the northern
sky, in clear conditions at least.
I wonder how far south this can be observed?

Col
--
Bolton, Lancashire.
160m asl.
http://www.reddwarfer.btinternet.co.uk
http://www.reddwarfer.btinternet.co....rPictures.html

"Gianna Stefani" wrote in message
...
An image of the northern sky, taken at midnight (local) on the summer
solstice, is available on my web site via the 'Sights' link, or here
www.buchan-meteo.org.uk/vedute.htm

It was a little cloudy so not quite 'daylight' but by no means dark.


As well as being one of my frequent "hits" in the winter, it also is at this
time of year. Land of the midnight sun -

http://www.rovaniemi.fi/images/webcam/kamera3_00001.jpg (Rovaniemi, Lapland)

Joe

"Col" wrote in message
...
I know of this effect as 'dayglow'. Clearly it won't be as pronounced
as at your latitude but for a few weeks around the solstice, even at
1 am (effectively midnight) there is a definite lightening of the northern
sky, in clear conditions at least.
I wonder how far south this can be observed?
I had a terrible time getting to sleep on Sunday night and spent much of the
time gawking out of the window to see whether there was any glow to the
north.

From what I remember (bearing in mind I was zombiefied by a lack of sleep
from Friday and Saturday nights as well!):

* At 11:30PM (BST) there was a fair bit of light to the north.
* At 1AM (BST), midnight GMT, it looked dark as far as I could see - there
are some 120-ft hills 3/4 mile to the north of me though.
* By 1:30 AM (BST), there was a faint glow to the north, suggesting the
coming dawn.

I'm pretty sure that if you had a flat horizon (eg looking over the sea),
you'd see a faint glow at midnight GMT even down here.

Reports from Leysdown, north Kent, 10m ASL.

That's a good shot of noctilucent cloud. I reported it from here on the
solstice.

Les

Gianna Stefani wrote:
An image of the northern sky, taken at midnight (local) on the summer
solstice, is available on my web site via the 'Sights' link, or here
www.buchan-meteo.org.uk/vedute.htm

It was a little cloudy so not quite 'daylight' but by no means dark.



--
Les Crossan,
Wallsend, Tyne & Wear
54.95N 1.5W
Home of the Wallsend StormCam and the Backup USW FAQ -
www.uksevereweather.org.uk

An image of the northern sky, taken at midnight (local) on the summer
solstice, is available on my web site via the 'Sights' link, or here
www.buchan-meteo.org.uk/vedute.htm

It was a little cloudy so not quite 'daylight' but by no means dark.


--
Gianna Stefani

Nice one Gianna - I used to live a few miles west of you at Auchleuchries
and I remember doing my gardening on one fine June "night" in the midst of a
run of night-shifts (I couldn't be bothered to get my body clock back to
normal). The croft was on the north side of a hill and clear skies meant I
could see enough to work until after midnight. After my "lunch" it was
already starting to get brighter again!

Martin
Guernsey (where we already need to have the lights on...)

Les Crossan wrote:
That's a good shot of noctilucent cloud. I reported it from here on the
solstice.

Isn't it just twilight? A quick check on twilight times for Gianna's
area shows that nautical twilight or astronomical twilight doesn't
happen; only civil twilight (sun up to 6 degrees below the horizon). You
can normally get by without artificial illumination during civil
twilight. By my reckoning for Gianna, the sun set's just after 10pm and
civil twilight happens about an hour and 10 minutes later. For higher
latitudes (such as Shetland), the sun won't set until 10:40pm and civil
twilight won't happen until nearly 0:30am.

--
Jonathan Stott
Canterbury Weather: http://www.canterburyweather.co.uk/
Reverse my e-mail address to reply by e-mail

I thought 57.5N was just that little too far south for astronomical
twilight to last all night?? After a quick check looks like I was wrong.
Could still be nlc though.. i'll stick to severe weather in future (:


Les

Jonathan Stott wrote:
Les Crossan wrote:

That's a good shot of noctilucent cloud. I reported it from here on
the solstice.

--
Les Crossan,
Wallsend, Tyne & Wear
54.95N 1.5W
Home of the Wallsend StormCam and the Backup USW FAQ -
www.uksevereweather.org.uk

"Les Crossan" wrote in
message news
I thought 57.5N was just that little too far south for astronomical
twilight to last all night?? After a quick check looks like I was wrong.
Could still be nlc though.. i'll stick to severe weather in future (:


Les


Les

Astronomical twilight does not end until the sun is 12 deg below the
horizon, so at the summer solstice it lasts all night at latitudes north of
54.5 deg.

I doubt whether NLCs contribute much to illimination in these circumstances,
but never having consciously seen one that is just a guess.

Regards, Roger

I sure saw a glow in the northern sky last night.

Around 2:30am, it was before dawn

The sky looked almost electrically charged, but not moving or changing
like northern lights. Don't normally see northern lights anyway, since
i'm in south-west england

I speculated it might have been high altitude clouds with the bright
moon shining off