The eye imagined to be specially used for the purpose of observing the sky in order to forecast the weather.(noun)
The Century Dictionary (Public Domain)
Use "weather-eye" in a sentence
"As Rolly has pointed out, there are several other moderators, including the outstanding Rolly himself and Pete, who does a splendid job on the technical forum, Jim in Cancun, etc etc - and we musn't forget our webjefe (David McL) who keeps his weather-eye open on the forums."
"And I think of feminists, embracing one of the most important historical movements of all time, and who, with an unprecedented weather-eye on process, and an insistence on inclusiveness, have managed to keep so much of that evil nonsense at bay."
"Planners of Barack Obama's acceptance speech for the Democratic presidential nomination at Invesco Field may want to keep a weather-eye out for history of a different kind."