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RUC frontogenesis, vertical motion, EPV and RH valid 1/06 UTC.
This slide shows the RUC analysis of frontogenesis, upward motion, negative EPV (shaded green) and RH, valid at 01/06 UTC. The upward motion maxima of 8 µb-1 is about half way between the GFS and NAM forecasts shown previously. The weak frontogenesis beneath the upward motion is more similar to the GFS forecast.