weather beacon fitted with a red sox championship banner sits atop the John Hancock building in Boston's Copley Square

Photo Credit: Manulife Financial Corp. via Boston Business Journal

We all have seen the John Hancock Weather Beacon, but how many of us know what it means?

The Boston Business Journal cites a poem that can help you decode it:

Steady blue, clear view.
Flashing blue, clouds due.
Steady read, rain ahead.
Flashing red, snow instead. (or in summer, Red Sox game is cancelled)