On Feb 7, 5:45*am, Weatherlawyer wrote:
On Feb 7, 2:09 am, Tudor Hughes wrote:





On Feb 6, 9:20 pm, mittens wrote:

How typical is it for storm systems moving up the eastern shore of
North America (what we call nor'easters) to travel across the North
Atlantic and impact Irerland and the UK?

These coastal lows are most common in North America from late fall
thru early spring. They are often not present at all during the summer
when the primary jet stream is far to the north.

It is fairly unusual for an active Low off the east coast of
the USA to reach the UK as a significant feature. *Some ex-hurricanes
may do it but they are re-invigorated over the Atlantic by the
inclusion of cold air from the north. *Our most active Lows usually
form to the southeast of Newfoundland or in mid-Atlantic. *We can get
Lows from anywhere and at any time of year, even occasionally the
northeast. *They are flabby but can be very wet.

Incidentally, low pressure is the one meteorological element
in which the UK trumps the US (except perhaps Florida with its
hurricanes) and every other country except Iceland. The UK record is
925 mb and my personal best is 951 mb, and that in relatively tranquil
south east England.

We have more tornadoes per square mile than any other country. There
are a number of other unique features to UK meteorology too. Not least
the temperate climate. Though I dare say Oregon could argue that.

The path for Lows generally is a spiral (in the right lunar phases
perfectly so) that brings Lows in from Mexico and California
diagonally across the USA and shunts them off into the Atlantic via
Labrador and Newfoundland.

Although this was a trend for much of this winter from the end of
November until that last spell, I confess I have forgotten the effect
that super typhoons have on the system.

When an high is involved it is a little more complicated and Lows tend
to come in from the North East Pacific, Seattle -Oregon and British
Columbia, though I have not followed the path in Canada when that
happens. They do seem to migrate south but overall it is a pall that
covers the continent I think.

This recent disaster mirrored in South America was an odd situation
where a series of Highs did much the same thing as expected of Lows.
Again it was in the absence of severe tropical storms that allowed the
energy free reign.

Not sure how of course. If I were to dare a theory it would be
something along the lines that whilst the O/A pattern is a spiral that
girds the earth almost twice in a cycle from the tropic to the Arctic
Circle, the actual weather induced is following lines of least
resistance.

(Lack of suitable data from Russia and China precludes any follow-up
from me.)

Most interesting is that the pattern is seen reproduced in the obverse
on the surface of the sun. Perhaps in that case we are observing only
the upper atmosphere and must suspect the activity to be anticyclonic.
But I feel it is more likely the result induced by the cause being
focussed on another plane.

If our weather is induced by luni-solar behaviour, it stands to reason
the same effect is visible on the sun, induced by the planets. And
since they all rotate in the same direction as one another....

I dunno.- Hide quoted text -

- Show quoted text -

I googled a bit and saw a diagram/map showing what you wrote about
lows tracking across the North American continent from the Pacific.
Though there is a meterological explanation for all that happens in
weather, I still find this to be amazing.

Bob