A volcanic spell?

I don’t have a clue what the BoM run is showing today but here goes:

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http://www.bom.gov.au/australia/charts/viewer/index.shtml?type=mslp-precip&tz=UTC&area=SH&model=G&chartSubmit=Refresh+View

The lunation is:  Last Quarter at 07:52 on the 22 April (2014) slightly different to the full moon on the 15th April, which was at more or less the same time (07:42)  but had a total lunar eclipse (where the sunlight from earth was reflected back to us. I don’t know if that last bit means anything except for the awesome beauty of it.)

We ran the full gamut of events with that spell though several large magnitude earthquakes, disturbed weather where Lows were displaced by Highs (the chief sign of them all) a couple of majestic volcanic eruptions major traffic accidents and even a tornado or two.

This spell is starting out like it is supposed to. (Damp weather for Britain) but it is too early to  say if it is going to stay. As two similar spells hand over there is generally a spot of rain here. (Britain (but even here regions vary considerably.))

Here is today’s North Atlantic run from the Met Office and Climategate:

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

Three things to look for in aberrant behaviour in sea level pressure charts are Blocking Highs; contra-rotating Lows and those black arcs on here that run 90 degrees to the isobars. I can’t give you the correct name for those but they indicate instability a phenomena I consider hyper-stable but there you go. That’s Scinece for you.

You can look up Blocking Highs (and blocking Lows but information of the other two is scarce, as meteorological theory might encompass tele-connection but doesn’t have much connection with geo-physics if it can’t be explained with gas laws and hellishly complex maths. (Fortunately, I was born stupid and failed to be guiled by idiots.))

Here are today’s North American EFS (a compilation of data from Mexico, USA and Canada given as Spaghetti and picked over by god knows what commands.) It has an amazing effect in helping to point out the difference in runs for earthquakes and those of volcanoes (though runs with volcanoes do not preclude earthquakes.)

Explanation follows pictures:

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http://weather.gc.ca/ensemble/naefs/cartes_e.html

The Lows shown above are adjacent in almost every chart. Seismicity will be highest where they run straight across but any such set up with 3 or more adjacent lows on three of four consecutive charts SHOUTS sigals of volcanic eruptions.

The line of Lows generally crosses the USA but can flow down the inside of the Rockies and egress via Mexico. Generally there will be an Oaxacan quake if that happens. (These are going around a central North American High another sure sign of significant volcanic activity.) The trail of the Lows can then track up off-shore to Newfoundland  or go straight across to the Norwegian Sea.

Ooh!

Forgot to mention aberrant storm tracks. Lows should leave Newfoundland to Scotland or Norway but they can go up through the Davies Straight (covered with the contra-rotation thing but just showing you I know stuff despite the temperament.) It’s just that this can happen without Highs in the North Atlantic blocking them.

(And is a good sign for eruptions.)

OK so here is the OPC simplified chart of the North Pacific. It is a good demonstrator of what happens at the same time with the North Atlantic plus it gets the weather first. There is a selection to suit all tastes there and all are available online for 14 days in 6 hour loops.
This is what boxes you have to click to get them:

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And here are last week’s analysis:

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You can find both sets on here along with the more complex red ones:

http://www.opc.ncep.noaa.gov/Loops/

Ditto the North Atlantic etc.. The Analysis charts are a lot prettier than the forecasts -which is why I prefer to use Climategate’s forecasts -even though they show less data.

One more thing is that the convention for drawing fronts doesn’t seem to apply to colours, just shapes. It is worth learning those though despite the fact so few are needed. Eruptions and quakes for example tend to occur at the ends of them (usually where they DON’T end up in the middle of a High or a Low.) (Actually; actually where they don’t end up in the middle of a High or a Low.)

***

OK; that is about it.

I have all the above charts for the last spell of course but they were nothing like this run…..

…or were they?

Hmmmm!

 

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3 thoughts on “A volcanic spell?

  1. The cyclone off Cape Horn is the size of Antarctica. Click the next link > > > > > ^
    I will post a set of Earthwind captures when I sort them (I have them as printed screen-shots and they need converting to an acceptable picture format for WordPress to post them for me.)

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