Red Sky at Night, Sailor's Delight
Perhaps the best-known bit of weather folklore is "Red sky at night, sailor's delight. Red sky in morning, sailors take warning." The saying dates back thousands of years and just might have some scientific truth behind it. Weather tends to move from west to east in the Northern Hemisphere. A red sky at sunset often results from clear skies, indicating that high pressure will keep storms at bay.
If the sky is red in the morning, the sunlight from the east could be illuminating moisture in the air, indicating that a storm is coming from the west.