Red clouds can be seen early in the morning over Santa Monica on Thursday, September 20, 2007. Before the advent of modern meteorology, explorers and settlers of North America developed rules of thumb for the weather based on common observations. One of the most famous – and sometimes true – is:
Red sky by morning,
sailor take warning.
Red sky at night,
sailor's delight.
sailor take warning.
Red sky at night,
sailor's delight.