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RUC Fgen/EPV Cross-Section at 09z, 28 October

Notes: A cross-section of frontogenesis and negative gestrophic saturation equivalent potential voriticity (EPV, indicative of instability to slantwise, upright or horizontal motions) indicated a sloping frontal zone from southern New England to central New York. A large area of negative EPV was located above the frontal zone. A mid-level front can also be seen in the middle of the cross-section.