Just looking at the 'ringing' vibration of clouds in satellite photo today and note how Mt Shasta seems to be where it all emanates from. 11:24 am here Portland time.
http://www.nrlmry.navy.mil/sat-bin/display10.cgi?SIZE=thumb&PHOT=yes&AREA=pacific/eastern/pac_northwest&PROD=vis&NAV=epac_westcoast&DISPLAY=Latest&CGI=epac_westcoast.cgi&CURRENT=20100511.1645.goes11.vis.x.wash_oregon.x.jpg&MOSAIC_SCALE=25
http://www.nrlmry.navy.mil/sat-bin/display10.cgi?SIZE=thumb&PHOT=yes&AREA=pacific/eastern/pac_northwest&PROD=vis&NAV=epac_westcoast&DISPLAY=Latest&CGI=epac_westcoast.cgi&CURRENT=20100511.1645.goes11.vis.x.wash_oregon.x.jpg&MOSAIC_SCALE=25