This week, the fog rolled in as Jack Frost kept his grip on the icy autumn mornings. Monday morning brought the first skiff of ice on the pond for the season, although, as afternoon temperatures warmed, it didn’t stick around for long. The past weekend was warm enough for a few insects to be out and about.
According to a few websites, fog tends to be more common in autumn. It has to do with the clearer night skies and the longer duration of the darkness. The Weather Guys on wxguys.ssec.wisc.edu explain this by saying “as the air cools during the longer night the relative humidity increases, which can result in to fog formation.”
The Weather Guys also mentioned evaporation fog and described it as a fog that forms when colder air moves over warmer water. “Evaporation fog over a lake gives the appearance of steam rising out of the water and is sometimes referred to as a steam fog,” they said.
In Jon Erdman’s “How Does Fog Form?” post on weather.com, he talks about radiation fog which “results from cold, dense air draining down mountain slopes at night, collecting in the valley floors, then forming…” This is the type of fog people see filling the valleys.
However, both sites did point out that fog doesn’t “burn off.” As the sun rises and warms the air the fog merely evaporates. While it doesn’t make for great driving conditions in the morning, the fog can make for some interesting photos.
(A Walk in the Woods contains photos from newsroom staffer Anna Applegate’s daily jaunts around her neck of the woods. Tagging along on the treks are dogs, Buford and Sherman, and goats, Kyle and Kennedy. Applegate manages the Good Times and can be emailed at email@example.com)