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Re: Overlaying gridded winds on satellite data [message #44928 is a reply to message #44816]

Thu, 21 July 2005 00:28

Chris Lee
Messages: 101
Registered: August 2003

Senior Member

In article <MPG.1d4873bfdf7ab7a5989a20@news.frii.com>, "David Fanning"
<davidf@dfanning.com> wrote:

> I'm not making any more changes in this program until someone sends me a
> definitive reference for wind barbs. This program has generated more
> unsolicited and contradictory advice than any I have ever written! If I
> now change the direction of the barbs, all hell will break loose. If
> *you* want to do it, however, look in the code for PLOTS commands. :-)
> Cheers,
> David

Wind barbs point in the direction the wind is coming FROM. Hence the
terms westward (winds coming from the west) and eastward (winds coming
from the east) etc.

http://ww2010.atmos.uiuc.edu/(Gh)/guides/maps/sfcobs/wnd.rxml
http://www.rap.ucar.edu/weather/info/about_windbarb.html
http://sanangelo.tamu.edu/bookmark/wind_dir.htm
http://www.al.noaa.gov/WWWHD/pubdocs/windbarb.html
(this one sounds `wrong' at first, but it really is correct, the feathers
are on the back of the `arrow', also tells you which way the feathers
point)

Of course, if the users wind vectors are wrong, there's no convincing
them otherwise. Wind vectors are usually northerly(to the north) and
easterly(to the east), but I've seen westerly data (you could
obviously use keywords like /WESTERLY and /EASTERLY).

I've never used the stationplot/windbarb programs. Can the STATIONPLOT
function show the cloud coverage (in the circle)? Or is the 3/4 filled
circle the symbol for a weatherstation?

Chris L.

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[Message index]

		Overlaying gridded winds on satellite data By: Chris[3] on Tue, 19 July 2005 21:17
		Re: Overlaying gridded winds on satellite data By: K. Bowman on Fri, 22 July 2005 09:56
		Re: Overlaying gridded winds on satellite data By: Chris Lee on Fri, 22 July 2005 00:33
		Re: Overlaying gridded winds on satellite data By: Chris Lee on Fri, 22 July 2005 00:31
		Re: Overlaying gridded winds on satellite data By: Mark Hadfield on Thu, 21 July 2005 16:00
		Re: Overlaying gridded winds on satellite data By: David Fanning on Thu, 21 July 2005 08:03
		Re: Overlaying gridded winds on satellite data By: R.G. Stockwell on Thu, 21 July 2005 07:53
		Re: Overlaying gridded winds on satellite data By: Chris Lee on Thu, 21 July 2005 00:28
		Re: Overlaying gridded winds on satellite data By: Chris[3] on Wed, 20 July 2005 14:52
		Re: Overlaying gridded winds on satellite data By: David Fanning on Wed, 20 July 2005 14:44

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