Mars, Saturn and Venus will form a triangle in the night sky just after sunset. Mersury also in the picture closer towards Sun.
http://spaceweather.com/
Other must have links for your hompage. Be prepared for everything.
http://www.nws.noaa.gov/radar_tab.php
http://neo.jpl.nasa.gov/ca/
http://www.nps.gov/archive/yell/oldfaithfulcam.htm (513am eruption seen. Earliest I've seen online!