"Colin Youngs" wrote in message
...
Philip Eden wrote in message ...
:http://www.climate-uk.com/EWSI.htm

Remarkably little snow for 1979.

Well, it ranked 12th out of 105. Lack of depth,
I suppose ... there were 40 days with snow lying
but it was never deeper than 9cm. In December
1981, by contrast, the deepest snow at 09z was
22cm and in February 1991 18cm.

The only double-figured depth since then was
10cm on the morning of 28th December 2000.

Philip Eden

Philip Eden wrote:
http://www.climate-uk.com/EWSI.htm

Philip Eden

Very difficult to interpret that data, Philip. What about a
decadal running mean? :-)

Tudor Hughes, Warlingham, Surrey

"Philip Eden" philipATweatherHYPHENukDOTcom wrote in message
...

"Colin Youngs" wrote in message
...
Philip Eden wrote in message
...
:http://www.climate-uk.com/EWSI.htm

Remarkably little snow for 1979.

Well, it ranked 12th out of 105. Lack of depth,
I suppose ... there were 40 days with snow lying
but it was never deeper than 9cm. In December
1981, by contrast, the deepest snow at 09z was
22cm and in February 1991 18cm.

The only double-figured depth since then was
10cm on the morning of 28th December 2000.

Philip Eden



Humm, so, and perhaps I've missed it, what defines the EWSI? It's not snow
lying then but some combination of lying (at 9am?) and depth?

"Philip Eden" philipATweatherHYPHENukDOTcom wrote in message
...
http://www.climate-uk.com/EWSI.htm

Philip Eden


Very interesting! Looking at it closely I notice that the snowfalls of
December didn't register on your index although it was a cold month. Even in
this part of England I had several days of 'snow lying' in 'northerly '
spells and usually I would expect Luton to get more snow in this weather
type. Also, did Luton miss out on the late April snows of 1950?
Peter Clarke
Ewell
Epsom55m

"Peter Clarke" wrote in message
...

"Philip Eden" philipATweatherHYPHENukDOTcom wrote in message
...
http://www.climate-uk.com/EWSI.htm

Philip Eden


Very interesting! Looking at it closely I notice that the snowfalls of
December didn't register on your index although it was a cold month. Even
in this part of England I had several days of 'snow lying' in 'northerly
' spells and usually I would expect Luton to get more snow in this weather
type. Also, did Luton miss out on the late April snows of 1950?
Peter Clarke
Ewell
Epsom55m
Just spotted I didn't make it clear it was December 1950 I was referring to!
Peter Clarke

"Peter Hearnden" wrote in message
...

Remarkably little snow for 1979.

Well, it ranked 12th out of 105. Lack of depth,
I suppose ... there were 40 days with snow lying
but it was never deeper than 9cm. In December
1981, by contrast, the deepest snow at 09z was
22cm and in February 1991 18cm.

The only double-figured depth since then was
10cm on the morning of 28th December 2000.

Humm, so, and perhaps I've missed it, what defines the EWSI? It's not snow
lying then but some combination of lying (at 9am?) and depth?

Yes, Peter ... it's a sum of 0900z snow-depths for the entire winter.
The idea was to have an index which incorporated both
quantity and persistence. It's in the FAQ.

pe

"Peter Clarke" wrote in message
...

"Peter Clarke" wrote in message
...

Very interesting! Looking at it closely I notice that the snowfalls of
December didn't register on your index although it was a cold month. Even
in this part of England I had several days of 'snow lying' in
'northerly ' spells and usually I would expect Luton to get more snow in
this weather type. Also, did Luton miss out on the late April snows of
1950?

Just spotted I didn't make it clear it was December 1950 I was referring
to!
Peter Clarke
Yes, Peter, the April 1950 snowstorm amounted to three hours of
light to moderate snow up here which didn't settle! We got 11cm
out of the April 1978 polar low, though.

pe

"Philip Eden" philipATweatherHYPHENukDOTcom wrote in message
...

"John Hall" wrote in message
...
In article ,
Philip Eden writes:
http://www.climate-uk.com/EWSI.htm

Is that 1919 in third place? That's a bit of a surprise.

Yes, a 30cm fall on Jan 27 which stayed with a fairly gradual
ablation for 3 and a half weeks.

The median value is just below 20, and, if you divide the
data in categories 0, 1-10, 11-20, etc, the modal
category is 1-10 (29 yrs) followed by 11-20 (22 yrs).
The inference is that the South Midlands winter has
always - well, since 1900 - been rather un-snowy.

I think you are confirming what I suspected, that it is being partly
driven by the 22 year solar cycle. However if you could add
larger ticks to the x axis on a decadal timescale to the diagram
it would make things a little clearer.

Cheers, Alastair.


Philip Eden

"Michael Mcneil" wrote in message
news:04e6a7618a0759e0314fd9429750cd6d.45219@mygate .mailgate.org

"Philip Eden" philipATweatherHYPHENukDOTcom wrote in message


http://www.climate-uk.com/EWSI.htm

Very erratic double cycle sequence there as befits the apparent erratic
behaviour of the moon. The next heavy snow spell due by that cycle, by
the way, is for somewhere around 2021 or so ish.

Sorry for this delay I lost the thread.

If I am not mistaken, the main dates for heavy snow a

19 07, 16,17,and 19
1928
1939, 40, and 42
1947, 55, 63 and 82.

Care to give me the months?


--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG