Exceptionally long wavelength swell today. Often only 1 wave in view
at a time http://www.sennen-cove.com/todaysurf.htm. Maybe originating
from an old hurricane.

Magic seaweed showed a dominant swell of up to 20secs recently
http://magicseaweed.com/Sennen-Surf-...#forecastTable
, but it's seemed even longer. Any comments Norman?

A feed of slightly warmer air from the south has raised the nightime
temperatures.

1st Min 10.3 Max 20.1 - Breezy but virtually unbroken sunshine
2nd Min 11.7 Max 19.9 - Less breeze, but a good deal of high level
cloud made the sunshine very hazy at times.

Graham
Penzance

On Sep 2, 4:15*pm, Graham Easterling wrote:
Exceptionally long wavelength swell today. Often only 1 wave in view
at a timehttp://www.sennen-cove.com/todaysurf.htm. Maybe originating
from an old hurricane.

Magic seaweed showed a dominant swell of up to 20secs recentlyhttp://magicseaweed.com/Sennen-Surf-Report/4/multiSwell/uk/#forecastT...
, but it's seemed even longer. Any comments Norman?

A feed of slightly warmer air from the south has raised the nightime
temperatures.

1st *Min 10.3 * Max 20.1 *- Breezy but virtually unbroken sunshine
2nd Min *11.7 *Max 19.9 - Less breeze, but a good deal of high level
cloud made the sunshine very hazy at times.

Graham
Penzance

On 30th August I wrote "It looks as if Danielle is heading for London
and Earl is heading for New York!" At the time the projected tracks
wer both going towards Greenland, but were changing daily so that by
allowing for more daily changes I could predict those destinations.
Earl now is heading for New York, but Danielle is no longer shown on
the NOAA map.
http://www.nhc.noaa.gov/index.shtml
So the swell could be caused by Danielle. Does anyone know where she
is now, or if she still exists?

Cheer, Alastair

Graham Easterling wrote:

Exceptionally long wavelength swell today. Often only 1 wave in view
at a time http://www.sennen-cove.com/todaysurf.htm. Maybe originating
from an old hurricane.

Magic seaweed showed a dominant swell of up to 20secs recently
http://magicseaweed.com/Sennen-Surf-...#forecastTable
, but it's seemed even longer. Any comments Norman?


Interesting one, Graham. I'm currently in Donegal. Yesterday and today I've
been on beaches facing mostly NW-N. There's been a long swell refracted onto
these beaches with a height of around 0.5m or perhaps a little higher. Both
yesterday and today I timed the period as around 20 sec so it has certainly
travelled a long way. I'm not currently in touch with developments so I can't
offer a suggestion for the source. Bear in mind that because swell travels on a
great circle track the source can be in a quite unexpected location. For
example, very strong SW winds off the mid-Atlantic coast of the USA will
produce a swell that reaches UK waters from W-WNW


--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.

"Alastair" wrote in message
...
On Sep 2, 4:15 pm, Graham Easterling wrote:

So the swell could be caused by Danielle. Does anyone know where she
is now, or if she still exists?

Cheer, Alastair

Quite close to home, but heading north.

http://www.woksat.info/etcsi02/si02-1406-b-ir-w.html



Bernard Burton
Wokingham, Berkshire, UK.

Weather satellite images at:
www.woksat.info/wwp.html

On Sep 2, 10:11*pm, "Bernard Burton" b.j.burton-
wrote:
"Alastair" wrote in message

...
On Sep 2, 4:15 pm, Graham Easterling wrote:

So the swell could be caused by Danielle. Does anyone know where she
is now, or if she still exists?

Cheer, Alastair

Quite close to home, but heading north.

http://www.woksat.info/etcsi02/si02-1406-b-ir-w.html

Bernard Burton
Wokingham, Berkshire, UK.

Weather satellite images at:www.woksat.info/wwp.html

Thanks Bernard,

It looks like Earl will pass by New York too, luckily for them :-)

Cheers, Alastair.

Norman wrote:

Graham Easterling wrote:

Exceptionally long wavelength swell today. Often only 1 wave in view
at a time http://www.sennen-cove.com/todaysurf.htm. Maybe originating
from an old hurricane.

Magic seaweed showed a dominant swell of up to 20secs recently
http://magicseaweed.com/Sennen-Surf-...#forecastTable
, but it's seemed even longer. Any comments Norman?


Interesting one, Graham. I'm currently in Donegal. Yesterday and today I've
been on beaches facing mostly NW-N. There's been a long swell refracted onto
these beaches with a height of around 0.5m or perhaps a little higher. Both
yesterday and today I timed the period as around 20 sec so it has certainly
travelled a long way. I'm not currently in touch with developments so I can't
offer a suggestion for the source. Bear in mind that because swell travels on
a great circle track the source can be in a quite unexpected location. For
example, very strong SW winds off the mid-Atlantic coast of the USA will
produce a swell that reaches UK waters from W-WNW


I should have added that a 20 sec period gives a crest-to-crest wavelength of
about 625 metres in deep water (deep water is defined as deeper than half the
wavelength). In 100m depth this wavelength is reduced to about 520m and in 10m
depth it is reduced to about 195m so even close inshore there's a long distance
between crests.

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.

On 5 Sep, 09:31, "Norman" wrote:
Norman wrote:
Graham Easterling wrote:

Exceptionally long wavelength swell today. Often only 1 wave in view
at a timehttp://www.sennen-cove.com/todaysurf.htm. Maybe originating
from an old hurricane.

Magic seaweed showed a dominant swell of up to 20secs recently
http://magicseaweed.com/Sennen-Surf-.../uk/#forecastT...
, but it's seemed even longer. Any comments Norman?

Interesting one, Graham. I'm currently in Donegal. Yesterday and today I've
been on beaches facing mostly NW-N. There's been a long swell refracted onto
these beaches with a height of around 0.5m or perhaps a little higher. Both
yesterday and today I timed the period as around 20 sec so it has certainly
travelled a long way. I'm not currently in touch with developments so I can't
offer a suggestion for the source. Bear in mind that because swell travels on
a great circle track the source can be in a quite unexpected location. For
example, very strong SW winds off the mid-Atlantic coast of the USA will
produce a swell that reaches UK waters from W-WNW

I should have added that a 20 sec period gives a crest-to-crest wavelength of
about 625 metres in deep water (deep water is defined as deeper than half the
wavelength). In 100m depth this wavelength is reduced to about 520m and in 10m
depth it is reduced to about 195m so even close inshore there's a long distance
between crests.

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.- Hide quoted text -

- Show quoted text -

What was unusual on this occasion was the lack of any obvious 2ndary
wave period or wind swell. Inbetween the primary swell it was
essentially flat, not even a kids bobyboarding wave. Kept the
lifeguards busy, as people were happily heading seaward in a calm
period, thinking the sea had gone flat, to be hit by a 4'+ wave as it
broke.

Graham
Penzance - Where we are getting the 1st measurable rain since 25/8 -
when there was 45.4mm in the 24 hours to 09:00 on 26th.