Weather Word of the Day

September 16, 2019

Freezing Fog - Freezing fog occurs when the water droplets that the fog is composed of are supercooled. Supercooled water droplets remain in the liquid state until they come into contact with a surface upon which they can freeze onto. As a result, any object that freezing fog comes into contact with can become coated with ice. Freezing fog can make for treacherous driving conditions due to limited visibility combined with icy patches that can develop on the road.

September 15, 2019

Black ice - A thin coating of clear ice that can form on roadways. It is most common during the winter season and is called black ice because the dark road surface can be seen through it.

September 14, 2019

Mist - A visible collection of tiny water droplets suspended in the atmosphere that can reduce visibility to as low as 5/8 of a mile. It does not reduce visibility as much as fog and is often confused with drizzle. Drizzle falls to the ground, while mist hangs in the lower atmosphere.

September 13, 2019

Glory - An optical phenomena that consists of colorful rings that appear around the shadow of an object when the shadow is cast onto a cloud deck below the objects elevation. A glory consists of violet coloring on the inner portion, while a reddish tint is seen on the outer edge. An airplane that casts a shadow on a cloud deck below it can create a glory that can be seen by passengers in the plane.

September 12, 2019

Centripetal Force - A force that acts on an object moving in a curved path. Centripetal force is directed towards the center of an objects axis of rotation. This force is responsible for keeping an object moving in a curved path.

September 11, 2019

Trowal - A trough of warm air aloft. It is usually a similar type of frontal structure as an occlusion, but not always. The term more used abroad than in the US.

September 10, 2019

Mirage - An optical effect created by the refraction of light caused by extreme temperature differences between the surface to just above it. The most common mirages look like pools of water in the distance over hot sand or pavement.