Stratosphere - The atmospheric shell above the troposphere and below the mesosphere. This layer of the atmosphere starts at around 8 miles above the surface and extends to around 30 miles above the earth. 19% of the atmospheric gases on earth are found here. The earth's ozone layer is located in this layer of the atmosphere.

Hiver - Hiver is the French word for winter.

Gustnado - A gustnado is a small whirlwind which forms as an eddy in thunderstorm outflows. They do not connect with any cloud-based rotation and are not tornadoes. Gustnadoes can appear as a dust devil, as a dust or debris cloud is sometimes seen. Like dust devils, some stronger gustnadoes can cause damage.

Thunderstorm - A local storm that spawns from a cumulonimbus cloud and is accompanied by lightning and thunder. The atmospheric conditions needed to produce a thunderstorm are warm and moist conditions in the low levels. It is estimated that around 1,800 thunderstorms are occurring on Earth at any given moment.

Inversion - A departure from the usual decrease or increase with altitude of the value of an atmospheric property. The specific region where the deviation occurs is referred to as the inversion layer. In meteorology, the most common type of inversion is a temperature inversion. Normally, the temperature falls off with increasing altitude. When an inversion layer is present, a specific layer of the atmosphere sees an increase in temperature with height.

Drizzle - A type of precipitation consisting of numerous tiny droplets of water less than 0.5 mm in diameter. Drizzle typically falls when there is fog or low stratus cloud cover over an area.

CAPE - An important term used to describe how unstable the atmosphere is. CAPE is an acronym for Convective Available Potential Energy. CAPE is a measure of potential energy in the atmosphere. The greater the CAPE is, the stronger a thunderstorm will be if one develops. The presence of CAPE alone does not mean thunderstorms will develop, as other factors must be overcome for the energy potential to be realized.