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Sujan Pal, Francina Dominguez, María Eugenia Dillon, Javier Alvarez, Carlos Marcelo Garcia, Stephen W. Nesbitt, and David Gochis

the warm air advection at ~30°S at the lower level. To understand the role of lower-level moisture advection during this event we plot a Hovmöller diagram of meridional wind ( V wind; Fig. 8a ) and moisture flux due to meridional wind ( Vq ; Fig. 8b ). It is clear that prior to the event ~0000 UTC 27 November, there is a strengthening of northerly SALLJ (deep purple shading) at ~850 mb carrying moisture southward. We see a reversal of lower-level wind direction after the event ~0000 UTC 28

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