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TeachMeFinance.com - explain Omega Omega The term 'Omega' as it applies to the area of the weather can be defined as ' A term used to describe vertical motion in the atmosphere. The 'omega equation' used in numerical weather models is composed of two terms, the 'differential vorticity advection' term and the 'thickness advection' term. Put more simply, omega is determined by the amount of spin (or large scale rotation) and warm (or cold) advection present in the atmosphere. On a weather forecast chart, high values of omega (or a strong omega field) relate to upward vertical motion (UVV) in the atmosphere. If this upward vertical motion is strong enough and in a sufficiently moist airmass, precipitation results'. Previous 5 Terms: OLR ombrology ombrometer ombrophobia Ombudsman Next 5 Terms: Omega High omegoid Omnibus Consolidated and Emergency Appropriations Act, FY1999 Omnibus Trade and Competitiveness Act of 1988 omniferous About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.