This rainbow cloud was spotted in Jamaica in October - the effect is produced by a phenomenon known as iridescence. This is caused when light is diffracted by water droplets and ice particles, causing the various wavelengths – each of which is detected by the human eye as a different color – to spread out.
Hurricane Sandy has formed in the Caribbean Sea. Sandy is now a Category 1 hurricane, and is about 30 miles south of Kingston, Jamaica. Environmental conditions are expected to remain favorable for additional strengthening to occur up until Sandy makes landfall on Jamaica early this evening.