On Friday, March 22, 2013 4:46:54 PM UTC, wrote:
"Togless" wrote in message ... To my untrained and inexpert eye, that naughty old jet stream seems to be waaaaaay too far south. Is it having a winter holiday in the Mediterranean or something? http://virga.sfsu.edu/scripts/jetstr...lsml_fcst.html I don't think it is just having a holiday. It has emigrated. Will -- http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm Will Hand (Haytor, Devon, 1017 feet asl) ---------------------------------------------

The jet stream is elongating and therefore becoming far more wriggly. Its a bit like when you used to play snake with a skipping rope as a kid - the longer the rope gets the more wriggles it can develop. This is partly why standard weather forecasting is becoming much more difficult and uncertain. More difficult unless of course you know by how much the rope has lengthened!