What is Arctic Air?

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.