Cloudless so far today on the coast. I've just returned from Godrevy (east
end of St Ives Bay). There was a stationery line of cloud along the
se-breeze convergence zobe.. It was (in fact still is) about 2 miles wide
and rather nearer the south coast. Took quite a nice picture of it
(www.easterling.freeserve.co.uk/Godrevy.html). The reflection in the sand
makes it.

Graham

Sorry about the spelling mistakes.

Graham

Graham

We've been having a debate in the windsurfing forums that we are no longer
in the sea breeze season - can you shed any light on this, and or clarify
the definition of what constitiutes a "sea breeze?

My own expereince in living on the beach for the past 15 or so years is that
we continue to have some sort of local thermal induced activity from May
through to late September - with the classic signs of clear skies over the
sea with clouds bubbling up inland over the South Downs (location is
Worthing West Sussex)

Please help!!!

"Graham Easterling" wrote in message
...
Sorry about the spelling mistakes.

Graham

We can certainly get a moderate sea breeze here up until the end of
September.

Basically all it needs is a light gradient wind, a bit of instability, and
the air temperature over the land being warmer than the sea. As the sea
temperature is currently around 17 degrees, the air temperature just inland
can still comfortably exceed that in September.

It's often really obvious here, as there is commonly a NW on the north
coast, and a southerly on the south coast simultaneously, as was the case
yesterday.

Marazion gets a really good (or bad, depending on your point of view) sea
breeze, as the wind can blow up through the marsh behind, right through to
the north coast sometimes. Hence it's popularity for wind-surfing.

--
Graham

"WeatherCam" wrote in message
...
Graham

We've been having a debate in the windsurfing forums that we are no longer
in the sea breeze season - can you shed any light on this, and or clarify
the definition of what constitiutes a "sea breeze?

My own expereince in living on the beach for the past 15 or so years is
that
we continue to have some sort of local thermal induced activity from May
through to late September - with the classic signs of clear skies over the
sea with clouds bubbling up inland over the South Downs (location is
Worthing West Sussex)

Please help!!!

"WeatherCam" wrote in message
...
Graham

We've been having a debate in the windsurfing forums that we are no longer
in the sea breeze season - can you shed any light on this, and or clarify
the definition of what constitiutes a "sea breeze?

Glider pilots certainly do not think of the sea breeze convergence season as
being over just yet.
That convergence on Tuesday showed up well on the satellite pictures.

It always seems quite remarkable how small the land/sea temperature
difference need be for a sea breeze to penetrate inland (even against the
gradient wind, ie produce the convergence) 2 degrees can suffice, but 3
degrees C is perhaps a better rule of thumb. Sea temperatures off Cornwall
would seem to be quite low this year at only 17 degrees (is this normal?
North Sea is warmer) so 20 degrees inland Cornwall would have been all that
was needed.

I liked the photo by the way.

Jack

"Jack Harrison" wrote in message
. ..


Sea temperatures off Cornwall
would seem to be quite low this year at only 17 degrees (is this normal?
North Sea is warmer) so 20 degrees inland Cornwall would have been all
that
was needed.

I liked the photo by the way.

Jack


The sea temperature off Cornwall reached 17 degrees back in June, and has
generally been between 17 & 18 degrees ever since. The maximum temperature
recorded at Sevenstones Buoy (off Land's End) this year was 18.6 on August
7th, before a period of rough seas set in.

The sea has felt warm this year. I think the large swell which has been a
feature of this summer, has caused a lot of mixing away from the immediate
coast. The North Sea has certainly been exceptionally warm.

Graham

Jack

Thanks for that confirmation - I've been in a head to head on a windsurfing
forum about "sea breezes" for the past couple of years - having lived on the
Coast for quite a few years and observed, all be it, our own "local
conditions" I know that we do have some sort of thermal activity right up to
the end of September.

What is at issue, is the term / definition of Seabreeze and is there a
distinct season - according to some Nautical Weather Handbooks - the
Seabreeze season is only up to mid July!!!

As you probably know I run a streaming weather cam on the Coast here at
Worthing along with a weather station and you can see how the breeze kicks
in - but according to some people this is often "frontal" activity - but
then as I say, it's always a coincidence then that this "front" comes in and
noon with the wind swinging to cross on shore and then dropping and veering
cross offshore at dusk!

REgards

"Jack Harrison" wrote in message
. ..

"WeatherCam" wrote in message
...
Graham

We've been having a debate in the windsurfing forums that we are no
longer
in the sea breeze season - can you shed any light on this, and or
clarify
the definition of what constitiutes a "sea breeze?

Glider pilots certainly do not think of the sea breeze convergence season
as
being over just yet.
That convergence on Tuesday showed up well on the satellite pictures.

It always seems quite remarkable how small the land/sea temperature
difference need be for a sea breeze to penetrate inland (even against the
gradient wind, ie produce the convergence) 2 degrees can suffice, but 3
degrees C is perhaps a better rule of thumb. Sea temperatures off
Cornwall
would seem to be quite low this year at only 17 degrees (is this normal?
North Sea is warmer) so 20 degrees inland Cornwall would have been all
that
was needed.

I liked the photo by the way.

Jack

On Thu, 2 Sep 2004 09:51:38 +0100, WeatherCam wrote in


Thanks for that confirmation - I've been in a head to head on a windsurfing
forum about "sea breezes" for the past couple of years - having lived on the
Coast for quite a few years and observed, all be it, our own "local
conditions" I know that we do have some sort of thermal activity right up to
the end of September.

What is at issue, is the term / definition of Seabreeze and is there a
distinct season - according to some Nautical Weather Handbooks - the
Seabreeze season is only up to mid July!!!
snip

If I may make a point here? :-) I see absolutely no reason why "mid July"
figures in such books. You rightly say conditions may be suitable for sea
breezes until much later in the year, given the right thermal contrast
induced by solar radiation.

--
Mike 55.13°N 6.69°W Coleraine posted to uk.sci.weather 02/09/2004 09:02:27 UTC