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RUC frontogenesis, ageostrophic circulation vectors and negative theta-e lapse rates 6/28 09 UTC.

RUC frontogenesis, ageostrophic circulation vectors and negative theta-e lapse rates 6/28 09 UTC.

Notes:

Well-defined axes of frontogenesis, sloping from southeast to northwest, are evident from the data on this slide. Flash flooding was again occurring where upward motion implied by the agesotrophic streamlines was co-located with instability (negative theta-e lapse rates, shaded purple).