Air sinks in a high pressure system; that’s why there’s more pressure. The sinking air traps dust. Air rises in a low pressure system, flushing the dust out of the lower atmosphere. The different amounts of dust cause more or less redness in sunrises and sunsets. A dust-reddened sunrise indicates that the higher air pressure is to the east, meaning it’s going away with the westerlies, taking the good weather with it. “Sailor take warning.” Red sunsets mean the good weather is to the west of us, coming closer with the prevailing winds. “Sailor’s delight.”
There are many similar sayings for haloes around the Sun and Moon and other meteorological phenomena, all used by people trying to live with the weather. Today we use other methods of measurement, but they are largely looking at the same things that produced the effects described in the old proverbs. The impulse to understand the weather was always there, but today we apply a system of science and technology that goes beyond appearances.
On radio and television and in newspapers we get continual updates and revised forecasts many times a day. On the internet we have access to the same maps, charts and satellite images. Here are some sites for weather lore, cloud pictures and a satellite image.