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Old Feb 18, 2006, 03:38 PM
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Wind Direction?????

i know this is a stupid question, but it is bugging me... the whole time i have been flying slope and i have never known......

when the weather report says "Winds WSW at 15 to 25 mph" does that mean:

A) the wind is blowing FROM the WSW at 15 to 25 mph?

OR

B) the wind is blowing TOWARDS the WSW at 15 to 25 mph?
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Old Feb 18, 2006, 03:40 PM
ave
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Old Feb 18, 2006, 03:43 PM
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As Ave says: Winds (and most meteorological reports) always indicate the SOURCE... So when you hear that, they are talking about where the wind is coming FROM.

Enjoy!

--Noel
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Old Feb 18, 2006, 03:49 PM
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thanks

since i'm asking... i might as well get another stupid question off of my chest. what is the difference between WSW and.... lets say SW???? does WSW mean it is blowing from the west and also the SW???
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Old Feb 18, 2006, 03:54 PM
ave
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Not dumb questions at all, before I was a wind junkie I had the same questions

Try a google search for how to read a compass: http://www.google.com/search?hl=en&q...read+a+compass

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Old Feb 18, 2006, 03:54 PM
Stay in it!!!!
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SW means from the south and west combined. WSW means that it has a little more of a westerly component.
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Old Feb 18, 2006, 03:56 PM
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Seattle
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S is 180 degrees.

W is 270 degrees.

SW is 225 degrees,

WSW is 247.5 degrees. Halfway between W and SW.
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Old Feb 18, 2006, 04:03 PM
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thanks... i never really paid attention to it.. normally i just walk outside and feel which way the wind is blowing and that decides what hill i go to... or i just pick out a new hill to fly at.
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Old Feb 18, 2006, 05:29 PM
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Of course, just to confuse the issue a little, when you look at wind barbs

They "point" in the direction that the wind is coming from.
My brain immediately looks at the pointy end of the barb and thinks SW,
but they really mean that it's pointing from the origin to the NE.
In this case that barb is indicating a NE wind, meaning the wind
is coming from the NE.


ian
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Old Feb 18, 2006, 06:05 PM
No slope for richardo
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Thanks daemon, I had an idea but wasn't 100%. Makes these maps easier to read: http://www.ndbc.noaa.gov/quikscat.php?station=wpow1
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Old Feb 18, 2006, 09:20 PM
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Grand Junction, Colorado
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I like the good old fashioned weather charts. Felt more like I knew what the big picture weather was doing better when I could look at this:

http://www.prh.noaa.gov/hnl/graphics/npac.gif

Worked well when I was in Hawaii. But I can't seem to track down that kind of map for the mainland/western US. Anyone know of a location? Feels like I've stumbled all over the page here:

http://www.crh.noaa.gov/ifps/MapClic...te=CO&site=GJT

and

http://www.crh.noaa.gov/product.php?...M&issuedby=gjt

but can't find that kind of thing. Did recently find some cool pages for a multitude of weather stations all over the viscinity that could come in handy for the area wind. Sweet!

This under ROMAN Weather Observations:

http://raws.wrh.noaa.gov/roman/cwa/GJT_frame.html

Can click on any of the tiny red pluses for current info and last 24 hours. Maybe this is old news, but it's new to me!
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Old Feb 18, 2006, 09:24 PM
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Palmdale, CA
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Here's the Weather Underground sites in Colorado.
http://www.wunderground.com/cgi-bin/...query=colorado
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Old Feb 18, 2006, 09:46 PM
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Seattle, WA
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http://www.rap.ucar.edu/weather/info..._windbarb.html



For the record, a simple conversion factor is to take knots and multiply by 1.15 (or 1.2 if you're lazy) to get the miles-per-hour strength of a wind.

--Noel
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