http://weather.uwyo.edu/cgi-bin/soun...000&STNM=03882

shows the warm,dry air in depth.Tropopause at ~170hPa, and thickness
565.
Does anybody know how unusual this is for early July?

David

In article .com,
Waghorn writes:
http://weather.uwyo.edu/cgi-bin/soun...PE=GIF%3ASKEWT
&YEAR=2006&MONTH=06&FROM=1000&TO=1000&STNM=0388 2

shows the warm,dry air in depth.Tropopause at ~170hPa, and thickness
565.
Does anybody know how unusual this is for early July?

It may _feel_ like early July, but it's actually only early June.
--
John Hall

"The covers of this book are too far apart."
Ambrose Bierce (1842-1914)

John Hall wrote:

Does anybody know how unusual this is for early July?

It may _feel_ like early July, but it's actually only early June.
--
Thanks, it's the heat you know,
D

"Waghorn" wrote in message
oups.com...
http://weather.uwyo.edu/cgi-bin/soun...000&STNM=03882

shows the warm,dry air in depth.Tropopause at ~170hPa, and thickness
565.
Does anybody know how unusual this is for early July?

[ assumed early June ]

.... as regards the total thickness (500-1000 hPa) value, 5655gpm,
looking at the list that Jon O'Rourke & I put together (see:-
http://homepage.ntlworld.com/booty.weather/tthkxtrm.htm ), and doing a
very rough linear interpolation between May & June, then for the period
these data cover (1945-1993), values close to 570dam wouldn't
necessarily seem to be out of place. The whole-May value of ~567dam must
be 'off' the 'extreme maxima' for early June I suppose, so 565 would, I
*guess* be within the top 5 % or so of high thickness values in this
corner of England using that dataset. Based on experience of plotting,
then analysing, these charts over 35yr, I would say that 565 in this
region was 'interesting' in the first third of June, without being
dramatic.

However, it may be that such occasions are becoming more common & the
45-93 record may not now be representative; I have kept a log of
thickness anomalies for a point notionally within the CET 'triangle'
since 1971.

Relating to the 1961-1990 long-term means, and just looking at *Junes*
in that series, during the 1970's & 1980's, above-average thicknesses
(by about 3dam or more, i.e. a reasonably 'significant' amount),
occurred once or twice in each of those decades.

In the 1990's though, anomalies =3dam occurred 5 times (1992, 1993,
1994, 1995, 1996), and so far, for the 2000's, we have had two (2003,
2005).

I suspect therefore that such high thickness values are becoming more
common, without having access to detailed records on the point.

Martin.


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and
http://booty.org.uk/booty.weather/metindex.htm

Waghorn wrote:
http://weather.uwyo.edu/cgi-bin/soun...000&STNM=03882

shows the warm,dry air in depth.Tropopause at ~170hPa, and thickness
565.
Does anybody know how unusual this is for early July?

David

The thickness is certainly well above average, but 565 dam is
not exceptional for this time of year. After all, temperatures above
30°C have been recorded in May and that cannot really occur with a
thickness of less than about the current figure.

Tudor Hughes, Warlingham, Surrey.