Once upon a time, I was a young sailor and had always heard about the “Red sky at night…etc” and never really knew where the origin was. So after photographing the morning sky south of Alvarado, I did some research and came upon this explanation. BTW – a major cold front is due this is afternoon, although not as brutal as what our friends up north are now going through but it does explain the fabulous sunrise I witnessed today.
In order to understand why “Red sky at night, sailor’s delight. Red sky in morning, sailor’s warning” can predict the weather, we must understand more about weather and the colors in the sky. Read on – 
https://www.loc.gov/rr/scitech/mysteries/weather-sailor.html