This message answers why wind is invisible, posted 3/1/2000 by Hailstorms. Hope
                 this helps! - C. Duvall Rutgers Univ. Meteorologist 3/5/2000 

                 A. Wind and Pressure: 

                 Please check out these messages I have posted regarding the wind: 

                 **Highs and Lows** 
                 **Wind and Hurricanes Explained** 
                 **Cyclones, Tornadoes, and Hurricnaes** 
                 **Inside a Tornado** 

                 You can find these messages by scrolling down the main list or by looking me up
                 By Author. 

                 There are also messages by other Weather Specialists that may be helpful for you
                 to understand about wind in general. 

                 B. Invisible Wind: 

                 Wind is air in motion. Air itself is made up of parts, or molecules, that are too small
                 for us to see with our own eyes, and lots of empty space between them. So when
                 air moves, we cannot see it unless there are things in the air that we can see, such
                 as dust, rain, snow, etc.. 

                 However, we can FEEL wind, because the molecules of the air are pushing against
                 our skin, just like we can feel rain, snow, or whatever visible things are blowing
                 around in the wind. 

                 I guess the key is to understand with anything "invisible", like the wind, is that just
                 because we can't see it, doesn't mean it isn't there! :-) 

                 Good question! Please let us know if you have any more... 

                 Hope this helps! 

                 - CD 3/5/2000