Some others in addition to what Tyler mentioned:
 
	College of Dupage: on any model map image, just click on the map and it will launch a sounding for that time http://weather.cod.edu/forecast/
 
	TwisterData: similar to Dupage, just click on the map - http://www.twisterdata.com/
 
	 
 
	Others for sounding or sounding data:
 
	http://www.wxcaster.com/models_text.htm
 
	http://vortex.plymouth.edu/myo/fx/raobfx.html
 
	http://www.stormchaser.niu.edu/machine/textfcstsound.html
 
	 
 
	For observed soundings (not modeled): http://www.spc.noaa.gov/exper/soundings/