Colorado Low - A low pressure system that forms in eastern Colorado or northeastern New Mexico. These types of lows typically track northeastward across the central Plains of the U.S. over a period of several days. Some of the strongest blizzards that occur during the winter season are oftentimes the result of a Colorado low.

Freezing Drizzle - A drizzle that falls as a liquid but then freezes into a light glaze or rime upon contact with the cold ground. Freezing drizzle is different than freezing rain because it accumulates at a much slower rate. Freezing drizzle tends to be localized and not widespread, which makes it more difficult to predict.

Mudslide - A large mass of mud falling down a hillside or slope. Mudslides are most likely when heavy rains occur after a prolonged dry period.

Dry slot - A zone of dry air which wraps east or northeastward into the southern and eastern parts of a low pressure system. A dry slot can at times be seen on satellite imagery as a cloud free area wrapping into a low pressure system.

Troposphere - The lowest part of the atmosphere, extending from the surface up to a height varying from about 4 miles at polar regions to 12 miles in the tropics. The troposphere is characterized by decreasing temperature with height, and this layer sees vertical wind motions, appreciable water vapor content, and is where all weather occurs.

Sublimation - Any process where a solid turns directly into a gas. In meteorology, this term is used to describe the process by which ice turns to water vapor. This process can be seen when observing the behavior of dry ice. Dry ice is actually frozen carbon dioxide that turns to carbon dioxide gas when it breaks down.

Isotach - A line of equal wind speed on a weather map. The most common use for isotachs is finding the location of upper level jet streams and jet streaks. For example, the polar jet stream in the northern hemisphere is located by analysing isotachs at around 30,000 ft. Isotachs in the polar jet stream can indicate winds speeds of over 200 mph at times.