A very nasty 0-Day exploit of Java (all versions) is now active and there is no patch available.
I strongly suggest you disable Java in your browser until a patch becomes available.
See:
http://securitywatch.pcmag.com/none/302019-security-warning-disable-java-nowNote: Java is not the same as JavaScript. The only widespread Java controls for weather-related things are the old Davis scroller and the Astrogenics StormVue Java Control.
Better to be safe than have to clean up a mess later.