http://weather.uwyo.edu/upperair/sounding.htmlIf you get the map in the link above, you find a lot of locations with different abbreviations on the map.
For Las Vegas, you have to find the "Around"-Location of Las Vegas. It's the South in Nevada. There, you find the abbreviation "VEF". You put your cursor on "VEF" and click with left key on your mouse. Then, you will get the list of data in that location, which gives you also the data in different height above the location.
The link at the moment is:
http://weather.uwyo.edu/cgi-bin/sounding?region=naconf&TYPE=TEXT%3ALIST&YEAR=2015&MONTH=07&FROM=2400&TO=2400&STNM=72388 :
longlink.comBelow you find three snapshots of the webpages. That way you have something reliable to get back to.
Then you compare these data with your experiences with the sky on July 24th 2015 above Las Vegas and go to the link
http://globalskywatch.com/chemtrails/ubbthreads.php?ubb=showflat&Number=15776#Post15776where you learn how to use these data according to present-day scientific knowledge for the right interpretations of the events in the sky above Las Vegas.