Apologies if this has been discussed elsewhere, but there is considerable speculation about the Jet Stream:
http://preview.tinyurl.com/39cmx84is a Channel 4 video embedded in a sott.net article (signs of the times) with sundry observations to be made of what you will.
Elsewhere on the interweb the Gulf oil spill is said to be severely affecting ocean currents, and thus air flows/weather etc, I dunno, but old mother earth must surely be getting just a tad bit peeved with some of personkind's activities...
