# The Lunatic Society

Predicting weather by the Moon or not, as the case may be.

Sticky post

Sticky post

## Foreword

The Lunatic Publications
is
but also,

tdjmd

Hello!

The administrators at The Lunatic Society would like you to join their group.

Regards,
The Lunarist Society

Clock showing the local time right now in Caracas
(Venezuela Time Zone)

## How hard is it to read a weather chart?

Reading a Weather Chart isn't really all that hard and is a skilful method for familiarizing yourself with forecasting.

I want to find a method to learn and to teach others how to do it...
Michael is also doing his best..
Me, more than obvious, in the role of the apprentice.

An Exercise of Great Patience
Michael McNeil
Do you know the origin of the word eccentric?
It is an engineering term.
And it appears on weather charts

It has a similar meaning with the weather.
See if you can see an eccentric patch on a weather chart.

tdjmd
do you call patches to those concentric rings?

Michael McNeil
Si.
An eccentric patch throws out a leg. It starts by becoming pointed or triangular.

At least that's how it looks on the BoM charts. With stuff in the North Atlantic it becomes eccentric on the outer edge.

Sometimes it throws a leg in between two systems of the opposite type.
The leg is called a trough if it is Low pressure. And you can guess what a ridge forms from.

tdjmd
Oh yes I have read about a trough.. but no idea what is or how it looks in a chart

Michael McNeil
Well go through some of the stuff you have and see if you can spot a leg running from one eccentric patch to another.

tdjmd1
No. Do me a favour, please
I need the model, the pattern first --if you show me how it looks in a chart I will be able to recognize it later by myself. Got it?

Michael McNeil
http://www.metoffice.gov.uk/weather/europe/surface_pressure.html

tdjmd
that 983 L has an eccentric centre and a leg?
(LOL) I'm guessing

Michael McNeil
This one becomes eccentric and it would throw out a trough but there is nothing to contain it so it just splits in two.
A trough forms between tow high pressure systems.

tdjmd
those systems look like a biological cell
any likeness?

Michael McNeil
People imagine a Low pressure area would dissolve into an high one and make all the pressure the same all over the sea or land.
But that NEVER happens.
So a trough or a ridge can form because the opposite pressures either side act like mountains or valleys fencing in the leg .
Or you could think of it as a boil spurting poison out between to complessing fingers.

In the chart for T+72 there is a High over Russia that is forming a Ridge of High Pressure out over the Mediteranian.
Really, all that region between the 1016 millibar and the 120 millibar line is a COL.
The same thing appears over Southern Greenland.
It generally looks like an X, made up of the outer rings of the other systems surrounding it.
An High in Greenland and the Low over Iceland, the Low in the Atlantic on the bottom of the chart and the High to the left of it.
And there is probably another Low on the left in North America, just waiting its turn to come over here.
If that bottom High grows, and the Greenland High stays, there will be a tornado when the North American Low moves in between.

tdjmd
okay. tell me now how is their movement.. where they are going to.. where do they come from and where do they go to..

Michael McNeil
Officially nobody knows. But I believe god knows. Ask hime to tell you and you will know what he tells me.

tdjmd
are there a law or something like that?
I suppose there is

Michael McNeil
When the weather doesn't move North West on the Atlantic chart, that's when it is time to batten down the hatches.

Nobody knows where Highs come from. We know that they form high in the air out of cold weather that is compressed as it falls between Low pressure systems.

But Highs in winter tend to remain a lot colder that Lows. A hell of a lot colder. But up in the top of the sky they are probably lower than minus 70.
Otherwise they wouldn't be able to fall.
Notice how close the different pressures are on that chart.
The High over Greenland is only 1016.
The Low off Spain is only 996.
So in all that distance the difference overall is just 20 millibars.
It is a bit more between Sweden and Russia.
I am on the t+84 chart

The other ones are too complex for me to explain to you just now.
Go back one to t+72 and you have three lows off Sweden.

But they are all the same pressure -more or less.
It is really all just nominal numbers. Look at the Greenland High.
You can't really call it an High.
But they do. It is very similar to your High from Yesterday. Just a name.

on t+60 they are still nearly the same pressures.

## HTML Table --How to contruct

Comes from.. Weatherlawyer's Post The next big thing.

We need to reverse the order of that list..

So then, it results in...

## Latest +5 Earthquakes Worldwide

Important!
This table is NOW being constructed at The Lunatic Repository...
Go see... http://my.opera.com/thelunaticsociety/blog/2013/10/02/tables