Why tornadoes behave the way they do. …

I'm just collating today's BOM charts (and subject to the usual waivers) it looks like there is a surge in the tornado strikes for this spell.

It is not repeated in today's North Atlantic though, so…

The lunar phase is a perfect one for thunderstorms. (Also no longer shown on the North Atlantic today.)

What is shown on the MetO's chart run is a northerly High moving to southern Europe, allowing dying Lows to pass through an anticyclonic sandwich (with the other High sitting on the shores of Norway.)

Activity seems low on the NEIC list so far today.

The main reason for posting with this headline is that the belt of stormy weather that surrounds Antarctica is holding off from the coast.

The black palls of depression that Do hit the line don't seem (to me at least) to contain much threat of earthquakes. It is, of course, summer so there is no daylight on the dark side of those storms.

Presumably the precipitation is lifting too soon?

Midnight last night:



This evening Wednesday 18th June 2012:



11 thoughts on “Stand-offishness

  1. I haven't looked at previous charts to check but when I first started posting them it was winter and the belt of Low pressure surrounding the continent was set up in a manner that looked identical to the stator plates of a small electricity generator.The above set looks more like a couple of knotty windings.No dark masses break the continuity.There are a fw well formed cyclones in the pot but they look harmless.The darkes has been there since the last spell. It is off South America, onm the Antarctic Peninsula. It is a signal for storms.Signals for earthquakes are much larger, darker and circular. And they are short lived.These things almost always occur in pairs on opposite sides of the continent. They do this regardless of what they signal, storms or earthquakes.(Explain that with Weggener.)These ten don't show the development clearly. That is because the tropical storms (slated for dispersal later today and tomorrow are still in the train.)That sounds contradictory. But the stand-off with stroms happens at the start of the affair.Once the precipitation makes the coast as a cyclone,the stream lines in the cyclone run across the continent to join with others ccylones. It is the direction of the closest isobars (seen as black lines) that indicate what sort of storm there will be.Thor's Day 20th June 2012:At last.It should become clear to you now:

  2. It is in the last few days of this spell we see the stand-off:And the birth of new storm structures:Can you see it?Or shall I show you the obvious?

  3. The cyclone we were watching has now gone ashore. And at the same time there were two more systems doing the same.Now one of them has dispersed:That means one of them is a seismic affair.But the other two are going to stretch out and meet:Or not as the case may be:That cyclone is still there:And it is a long time out. So a lot can happen by then.I just don't know what.But having one eye, even with poor focus and cataracts, makes me king; no?

  4. Look at this small cyclone between 100 and 120 east:The colour is due to the number f isobars in the system. Obviously, the more that are in it the darker it will be unless they are spread out.Another thing is that with great power comes great difficulty in containing it.Such systems NEED to run away with their energy.There is a trick you can do with a bottle of water.To empty it quickly you cause the water in it to rotate. Then tip the water out and it runs smoothly because it has developed a vortex. Air can low into the bottle to replace the water without having to force the water out of the way.But this fast motion will cause a thin walled vessel to collapse. A plastic bottle doesn't have the structure to keep its own shape despite the balance of things inside. (Water pressure is displaced by air pressure.)What happens it that the force is active in all direction at all times. The force inside the bottle has an equal and opposite force outside the bottle.It is only because the bottle does not collapse that air has time to run into the reservoir to replace it.As you can see, there are no containers on this chart.So how is a cyclone able to hold itself together?

  5. Originally posted by Weatherlawyer:

    So how is a cyclone able to hold itself together?

    Here's another one:Why do Low pressure areas keep away from High pressure areas?Does it make sense to you that Lows skirt around Highs?The pattern around th continent has now changed. It is midnight the start of Sunday 24 June 2012:A lot can happen in 4 days:But not (I think) in fluid dynamics. Cyclones it would seem have no difficulty in lasting for most of a spell not moving much and not weakening much and basically not much of anything.Let's face it. If you were that powerful would you let weather push You around?

  6. The fact is that some quite intense tornadoes are due from this afternoon on:Etcetera, etcetera.Then not, then more.Just no boat anchors to prove it.Pity, that.

  7. I can't say I understand how this works:The USAnians haven't quite grasped the full import of GMT, yet:It's all on there somewhere; sort it out for yourselves.

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