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Quasi-stationary fronts are not indicated on Extratropical Cyclone Diagrams.  Applying thresholds to the magnitude of the cross-front geostrophic wind - ensuring that that is small - could in principal facilitate this. However, it was deemed more ihelpful helpful for users to find and show incipient frontal waves (as indicated by coloured dots) and follow their subsequent track and development, and for that we need the meeting points of cold and warm fronts.

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