Accuweather has wind trajectory maps:
"A state of emergency was declared on Sunday at a nuclear power plant in Onagawa, Japan, as well. Excessive radiation levels have been recorded following Friday's earthquake, according to the United Nations' atomic watchdog agency..."
http://www.accuweather.com/blogs/news/story/46940/winds-at-japan-power-plants-sh-1.asp
http://squall.sfsu.edu/gif/jetstream_pac_loop.gif
