9 hr NAM frontogenesis and vertical circulation - valid 21z 9/30

Notes:

The strong, focused upward vertical motion associated with the frontogenesis can be seen on the slide, showing frontogenesis (filled) and the associated vertical circulation (yellow arrows), valid at 21z on the 30th . The bands of enhanced rainfall associated with the frontogenesis can be seen developing on the next few slides.

slide 13



Slide 13

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