On a 500 HPa Chart, Why Does Middle-Latitude Cyclone Development

question 45

Short Answer

On a 500 hPa chart, why does middle-latitude cyclone development occur beneath troughs rather than ridges?

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AND

A logical operator in programming and mathematics that results in true if and only if all operands are true.

OR

A logical operation that yields true if any of its operands are true, commonly used in programming and digital logic.

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The act of sending brief, electronic messages between two or more mobile devices.

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Short Messaging Service, a text messaging service component of most telephone, internet, and mobile-device systems.