I asked this in the "2006 weather quetion thread" with no luck - so I'll try again! I have a general question regarding what is the Jet stream. I have very little understanding of what it has to do with the weather (and snow). I know its just a current of fast moving air between warm/cold air masses. My question is - is there an ideal placement of the Jetstream for cold/snowy weather? I would guess that becuase it represents a boundry between the cold polar air and temperate air masses, then the further north the stream are locateed the better - because we'd have the polar air over southern Australia. Probably wrong though. Also - what happens when the two jetstreams overlap? Is this good? Cheers!