NSC Hurricane watch

[brighton rock]

It looks like anticlockwise to me.

Good kite flying weather.

anticlockwise for huricans
clock wise for tyfoons around japan chins etc

 

[Gazwag]

** POINTLESS QUESTION ALERT **

So is that storm spinning clockwise or anti-clockwise ?
I guess this would be dictated by the direction the Earth spins on its axis, or something.

First one who can provide me with a convincing argument one way or the other will win a slightly bent paperclip which I sucked on yesterday.

Does this help ?


Subject: D3) Why do tropical cyclones' winds rotate counter-clockwise (clockwise) in the Northern (Southern) Hemisphere?

The reason is that the earth's rotation sets up an apparent force (called the Coriolis force) that pulls the winds to the right in the Northern Hemisphere (and to the left in the Southern Hemisphere). So when a low pressure starts to form north of the equator, the surface winds will flow inward trying to fill in the low and will be deflected to the right and a counter-clockwise rotation will be initiated. The opposite (a deflection to the left and a clockwise rotation) will occur south of the equator.

 

[Easy 10]

anticlockwise for huricans
clock wise for tyfoons around japan chins etc

The fact that you've managed to mis-spell "hurricaine" and "typhoon" has planted one or two seeds of doubt in my mind as to the validity of your statement.

And thats before we even broach the subject of your choice of football team.

 

[Juan Albion]

The fact that you've managed to mis-spell "hurricaine" and "typhoon" has planted one or two seeds of doubt in my mind

Ooops.

 

[Gazwag]

Bit more info for Easy 10:


The terms "hurricane" and "typhoon" are regionally specific names for a strong "tropical cyclone". A tropical cyclone is the generic term for a non-frontal synoptic scale low-pressure system over tropical or sub-tropical waters with organized convection (i.e. thunderstorm activity) and definite cyclonic surface wind circulation (Holland 1993).

Tropical cyclones with maximum sustained surface winds of less than 17 m/s (34 kt, 39 mph) are called "tropical depressions" (This is not to be confused with the condition mid-latitude people get during a long, cold and grey winter wishing they could be closer to the equator ;-)). Once the tropical cyclone reaches winds of at least 17 m/s (34 kt, 39 mph) they are typically called a "tropical storm" and assigned a name. If winds reach 33 m/s (64 kt, 74 mph)), then they are called:

"hurricane" (the North Atlantic Ocean, the Northeast Pacific Ocean east of the dateline, or the South Pacific Ocean east of 160E)
"typhoon" (the Northwest Pacific Ocean west of the dateline)
"severe tropical cyclone" (the Southwest Pacific Ocean west of 160E or Southeast Indian Ocean east of 90E)
"severe cyclonic storm" (the North Indian Ocean)
"tropical cyclone" (the Southwest Indian Ocean)

 

[Easy 10]

Does this help ?


Subject: D3) Why do tropical cyclones' winds rotate counter-clockwise (clockwise) in the Northern (Southern) Hemisphere?

The reason is that the earth's rotation sets up an apparent force (called the Coriolis force) that pulls the winds to the right in the Northern Hemisphere (and to the left in the Southern Hemisphere). So when a low pressure starts to form north of the equator, the surface winds will flow inward trying to fill in the low and will be deflected to the right and a counter-clockwise rotation will be initiated. The opposite (a deflection to the left and a clockwise rotation) will occur south of the equator.

Ahh, now we're getting somewhere.

So if a storm forms in the southern equator, and then crosses over into the northern equator, does the direction it is spinning in then change ? Or does it continue spinning in its original direction in accordance with the hemisphere in which it was formed ?

 

[Easy 10]

Ooops.

Well, mine was CLOSER, and I've been drinking.

 

[Marc]

Easy, half way down the page they have an animated guide to how Hurricanes are formed:
http://news.bbc.co.uk/1/hi/world/americas/3643142.stm

 

[Juan Albion]

Well, mine was CLOSER, and I've been drinking.

Feire enuf.

 

[On the Left Wing]

Ahh, now we're getting somewhere.

So if a storm forms in the southern equator, and then crosses over into the northern equator, does the direction it is spinning in then change ? Or does it continue spinning in its original direction in accordance with the hemisphere in which it was formed ?

Try this age old experiment
Get a washing up bowl and cut a small hole in its base big enough for a sink plug.
Fill bowl full of water and stand two metres north of the Equator.
Remove plug and water empties clockwise.
While emptying, walk briskly across the equator until you are two metres south.
The water immediately does an about turn and empties anti-clockwise.
The same applies to hurricanes and typhoons!

 

[Gazwag]

Ahh, now we're getting somewhere.

So if a storm forms in the southern equator, and then crosses over into the northern equator, does the direction it is spinning in then change ? Or does it continue spinning in its original direction in accordance with the hemisphere in which it was formed ?

I would guess it must change direction or just implode upon itself.

The may not exist close to the equator though, I seem to remember from somewhere that there is very little wind on the equater - isn't that where the doldrums are which give sailing ships problems as there is little wind? Not sure about the pacific though

 

[Gazwag]

Try this age old experiment
Get a washing up bowl and cut a small hole in its base big enough for a sink plug.
Fill bowl full of water and stand two metres north of the Equator.
Remove plug and water empties clockwise.
While emptying, walk briskly across the equator until you are two metres south.
The water immediately does an about turn and empties anti-clockwise.
The same applies to hurricanes and typhoons!

arrhh but:

NOTE: This force is too tiny to effect rotation in, for example, water that is going down the drains of sinks and toilets. The rotation in those will be determined by the geometry of the container and the original motion of the water. Thus one can find both clockwise and counter- clockwise flowing drains no matter what hemisphere you are located. If you don't believe this, test it out for yourself.

 

[Easy 10]

Try this age old experiment
Get a washing up bowl and cut a small hole in its base big enough for a sink plug.
Fill bowl full of water and stand two metres north of the Equator.
Remove plug and water empties clockwise.
While emptying, walk briskly across the equator until you are two metres south.
The water immediately does an about turn and empties anti-clockwise.
The same applies to hurricanes and typhoons!

So what happens if you are ON the equator. Does the water shoot straight down ?

 

[On the Left Wing]

So what happens if you are ON the equator. Does the water shoot straight down ?

Exactly that ... it stops its spiral ... yes!

 

[On the Left Wing]

arrhh but:

NOTE: This force is too tiny to effect rotation in, for example, water that is going down the drains of sinks and toilets. The rotation in those will be determined by the geometry of the container and the original motion of the water. Thus one can find both clockwise and counter- clockwise flowing drains no matter what hemisphere you are located. If you don't believe this, test it out for yourself.

Sorry but that is bollox.
The force of rotation is very strong and no matter what the design of your basin you will get clockwise empting north of the equator and anticlockwise south of it!
Everyone go and try it now!

 

[Easy 10]

Easy, half way down the page they have an animated guide to how Hurricanes are formed:
http://news.bbc.co.uk/1/hi/world/americas/3643142.stm

That is bloody brilliant. I vaguely knew the theory behind how hurricanes are formed, but with the animated diagrams I am now quite an authority on the subject. I shall now be able dazzle my family and friends with an in-depth lecture on the subject.

I might even do a presentation.

 

[lost in london]

the idea of a hurricane on its side is fantastic, like a great big disc cutter roaming the world cutting a very thin line of damage. Neighbour's house flatted, family cut in two in their beds, your house perfectly fine. I like that.

 

[Gazwag]

Sorry but that is bollox.
The force of rotation is very strong and no matter what the design of your basin you will get clockwise empting north of the equator and anticlockwise south of it!
Everyone go and try it now!

I was only stating what I found on google and after doing another search I am happy I am corrects - see also this:

On the series Pole to Pole I believe that Michael Palin walked 50 metres either side of the equator. The Coriolis effect, caused by Coriolis acceleration is absolutely negligible. (It is most pronounced at the poles.) I guess that you didn't hear a later interview with Michael Palin where he explained that those scenes had to be filmed numerous times in order to get the water to flow in the "correct" direction.

 

[lost in london]

has there ever been a thread that hasn't turned into an argument and become quite personal?

 

[Marc]

has there ever been a thread that hasn't turned into an argument and become quite personal?

piss of you london twat











joking of course, but you make a valid point!