NAM 00-hr frontogenesis cross-section valid 3/1 18 UTC.

frontogenesis cross section

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The development of strong, low-level frontogenesis associated with this wind shift is shown in the next few slides. At 18 UTC, no significant low-level frontogenesis is indicated by the NAM analysis. The green shading in the next several figures indicates negative EPV (instability to slantwise displacements, and possibly to vertical displacements).

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