Explanation
A mariner's rhyme used for the weather. Sailors and shepherds have used it for centuries to make a rough weather forecast just by looking at the color of the sky at sunset and sunrise.
Todays pickGreat Lakes: HOMES → SHAME
Mnemonic device
Red sky at night
Red sky at night: shepherds' delight.
Red sky in the morning: shepherds' warning.
Rainbow in the morning: travelers take warning.
Rainbow at night: travelers' delight.