What is meteorology?

Meteorology is the study of Earth's atmosphere.  

It's a science that deals with the atmosphere and its phenomena, especially the weather. It's focused on the current state of the atmosphere at a given time or place, and is therefore more short-term compared to climate or climatology. 

Meteorology is broken up into four separate branches based on spatial scale:

Microscale Meteorology deals with any phenomena that are 1 kilometer in size or smaller such as heat transfers or individual clouds.

Mesoscale Meteorology deals with phenomena that are on the higher end of microscale up to several hundred kilometers such as severe thunderstorms or lake effect snowstorms.

Synoptic scale Meteorology deals with larger atmospheric concepts on the order of 1,000 kilometers or more and includes daily weather map features such as fronts and high or low pressure systems.

Global scale Meteorology deals with weather systems of the global scale such as El  Nino.

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Record 78°F November 18, 1921 16°F November 18, 1933