What is cyclogenesis and how do weather systems form?

Cyclogenesis is the development or strengthening of cyclonic circulation in the atmosphere, resulting in a low-pressure area. It serves as an umbrella term for at least three distinct processes, ranging from microscale to synoptic scale. These include tropical cyclones driven by latent heat, extratropical cyclones forming along weather fronts, and mesocyclones over land that can lead to tornadoes.

What we know

• Cyclogenesis is defined as the development or strengthening of cyclonic circulation in the atmosphere, creating a low-pressure area. [3]
• Cyclogenesis encompasses at least three different processes operating across scales from the microscale to the synoptic scale. [3]
• Low-pressure systems form under areas of wind divergence occurring in the upper levels of the atmosphere. [4]
• Explosive cyclogenesis involves a rapid pressure drop of 24 millibars or more within a 24-hour period, depending on latitude. [2, 3]

Where to go next

• what caused itWhat causes explosive cyclogenesis?
• how it workedHow do tropical cyclones form?
• compared withWhat happens during anticyclogenesis?
• the bigger pictureHow do low-pressure areas work?
• a case in pointCan mesocyclones create tornadoes?
• an unexpected connectionHow do weather bombs relate to nor'easters?Explosive cyclogenesis, commonly known as a weather bomb, is usually present during the formation of a nor'easter.

Sources

• [1]explosive cyclogenesis (Wikidata Q2909653) · CC0 1.0
• [2]Explosive cyclogenesis · CC BY-SA 4.0
• [3]Cyclogenesis · CC BY-SA 4.0
• [4]Low-pressure area · CC BY-SA 4.0
• [5]Tropical cyclogenesis · CC BY-SA 4.0