Re: GlobalFlyer -- Pacific Jet Stream Charts?

[Montblack]

("RST Engineering" wrote)
> I'm trying to figure out whether or not Fossett will be able to get back
> home with 2600 pounds of fuel missing. I can't find jet stream charts
> from Japan over Hawaii to the Left Coast anywhere.
>
> Anybody got a URL for me?


Main Weather Page:
http://www.weatherimages.org/index.html#aviation
Go down to Aviation Corner - 11 yellow block(?) down the page.

Pacific 300mb Jet Stream:
http://www.weatherimages.org/data/imag213.html
On Aviation Corner page - right side of page.

There might even be better sites within the main page too?


Montblack

[Larry Dighera]

On Wed, 2 Mar 2005 12:20:45 -0800, "RST Engineering"
> wrote in
>::


>Anybody got a URL for me?

http://www.virginatlanticglobalflyer.com/

[Larry Dighera]

On Wed, 02 Mar 2005 21:20:55 GMT, Larry Dighera >
wrote in >::

>On Wed, 2 Mar 2005 12:20:45 -0800, "RST Engineering"
> wrote in
>::
>
>
>>Anybody got a URL for me?
>
>http://www.virginatlanticglobalflyer.com/


Oops. That should have been:
http://virga.sfsu.edu/gif/jetstream_pac_init_00.gif

[RST Engineering]

Thanks, fellers. Both Larry and Montblack posted pretty much the same
picture, but they are not worth too much without velocity information. I
had those; I was hoping for something with a little more information.

But thanks anyway. Fossett is doing what we have all done when trying to
stretch a cross-country home without a fuel stop...if you've got the wind at
your back, slow it down and let the wind help and the engine not suck so
much fuel; if you've got the wind on your nose, firewall it (within limits,
of course) and beat the wind at its own game.

Jim

[George Patterson]

RST Engineering wrote:
>
> Thanks, fellers. Both Larry and Montblack posted pretty much the same
> picture, but they are not worth too much without velocity information. I
> had those; I was hoping for something with a little more information.

Try http://squall.sfsu.edu/gif/jetstream_pac_init_00.gif . Looks like the high
speed band is in the 30N parallel west of Hawaii, then drops down about 10
degrees, crossing the coast on the Baja peninsula. He can pick up favorable
winds around 90 knots at times.

George Patterson
I prefer Heaven for climate but Hell for company.

[RST Engineering]

That is exactly the same image that I've seen from Larry and Montblack. How
in the hell do you determine velocity from it?

Jim


"George Patterson" > wrote in message
...

> Try http://squall.sfsu.edu/gif/jetstream_pac_init_00.gif . Looks like the
> high
> speed band is in the 30N parallel west of Hawaii, then drops down about 10

[Scott Skylane]

RST Engineering wrote:
> That is exactly the same image that I've seen from Larry and Montblack. How
> in the hell do you determine velocity from it?

The grey bands indicate wind speed. The legend is at the bottom of the
image. It appears that if he takes a more southerly tack, he might be
able to keep a good boost.

Happy Flying!
Scott Skylane

[RST Engineering]

That was my hit too, seems that if he goes north of Hawaii and hits Baja Ca
then into southern Texas, then says to hell with it and takes a straight
shot profile descent for Kansas he has a chance.

But AGAIN, how do you read these charts. You say the grey bands indicate
wind speed. How? They all look the same grey to me. How do you
differentiate between the jet stream wind velocities?

Jim



"Scott Skylane" > wrote in message
...
> RST Engineering wrote:
>> That is exactly the same image that I've seen from Larry and Montblack.
>> How in the hell do you determine velocity from it?
>
> The grey bands indicate wind speed. The legend is at the bottom of the
> image. It appears that if he takes a more southerly tack, he might be
> able to keep a good boost.
>
> Happy Flying!
> Scott Skylane

[George Patterson]

RST Engineering wrote:
>
> That is exactly the same image that I've seen from Larry and Montblack. How
> in the hell do you determine velocity from it?

There's a legend just below the chart. On the right side of the screen, it says
"Wind speeds in knots." On the left side, there's a bar chart. According to the
bar, anything below 60 knots is white. The darkest grey is 60 knots. The
lightest grey is 150.

So, looking at the section about 150 degrees west. At about 15N, we have a 60
knot band. Just above 15N, there's a 70 knot band. In the middle of that band is
a dotted line. Just above that is an 80 knot band, then a 90 knot band. Then we
start back down in velocity as we move north.

The highest wind I see in that area is a 100 knots. There's one section of this
just to the right of the 150W line. Some of the stuff up around Alaska may be
higher.

I have a high resolution, medium size monitor for my photo work. Perhaps yours
doesn't differentiate the grey bands well.

George Patterson
I prefer Heaven for climate but Hell for company.

[Dan Girellini]

"RST Engineering" > writes:

> But AGAIN, how do you read these charts. You say the grey bands indicate
> wind speed. How? They all look the same grey to me. How do you
> differentiate between the jet stream wind velocities?

It is pretty hard to see the gradient. I streteched and it is a bit clearer in
this version:

<http://www.longhands.org/jetstream_pac_init_00.gif>

Dan.

[Larry Dighera]

On Wed, 2 Mar 2005 15:37:48 -0800, "RST Engineering"
> wrote in
>::

>Both Larry and Montblack posted pretty much the same
>picture, but they are not worth too much without velocity information.

The image at the link I posted indicates wind velocity by the length
of the arrows and the color of the blue-gradient shading.