There are many old farmers' sayings that are used to predict the weather. One such saying is, "If the sun has a halo, rain to follow."

When you see a halo around the sun, that is an indicator that there is moisture high in the atmosphere. If the halo is followed by high, thin, wispy cirrus clouds, then there is a storm system approaching you. It's typically 24 to 48 hours away.

It isn't a guarantee that precipitation is coming since the storm may miss you. For example, if the cirrus deck is in our southern sky and the clouds are moving east, the storm will likely miss you to the south. However, if that cirrus deck is to your west, more than likely you will see precipitation in a day or two as most of our weather comes from the west.

So even on a bright, calm day, look up! What you see may be a predictor of weather to come.

Since cirrus clouds are a fairly reliable weather predictor, what about woolly bear caterpillars?